This could almost be a subset of educational software but for the fact that many of these programs had serious applications in the engineering, math and science realms. A surprising amount of highly specialized engineering, math and science applications were released for the Sinclair computers.
| Name | Description | Computers |
|---|---|---|
| 10 Programs for the ZX81 | Examples of input/output and instructions. 6 on statistics: student, paired observations, correlation, linear regression, analysis of variance, and chi squared. 4 on fish hatchery management: 2 on fish food order and daily feed programs (one for rainbow trout; one for cutthroat trout), fish hatchery records; flow and density index calculations. | Timex/Sinclair 1000 |
| 3 Factor ANOVA with Interaction | Evaluates ANOVA where a single subject is exposed to one level for each factor. Up to 5 levels of treatment per factor; up to 5 subjects per cell. 7 F-statistics are tested by an error term. | Timex/Sinclair 1000 |
| AC Circuit Analysis | Frequency response, op-amps, NPN transistors, FETs, transmission lines, open/short stubs, RLC circuits. 16K. | Timex/Sinclair 1000 |
| Advanced Math | Allows you to use a complex multiplication of more than 2 digits. | Timex/Sinclair 2068 |
| Advanced Math | Timex/Sinclair 1000, Timex/Sinclair 2068 | |
| Aircraft Performance Program | Charts climb rate vs airspeed to make performance comparisons of aircraft under varying conditions of weight, power, and altitude. Booklet with listing, explanation of all equations, and a tabulation of specifications for 250 production and home-built aircraft. | Timex/Sinclair 1000 |
| Algebra Solver | 16K. | Timex/Sinclair 1000 |
| Amplifier CAD | Computer-aided design tool. Automatically calculate component and circuit values for amplifiers. | Timex/Sinclair 1000 |
| Antenna Design | For FM, HAM, and TV antennas. Design your own or modify your current antenna to optimize the reception in your specific location. | Timex/Sinclair 1000 |
| Antenna Design | Design your own cubical quad, yagi beam or inverted Vee antenna for ham or CB radio. | Timex/Sinclair 1000 |
| Anypoint Plotter | Crunches any data to allow the best possible graph by readjusting the vertical coordinate to each set of data. A data summary will then follow including lowest and highest data points, data sum, and data mean. 1K. | Sinclair ZX81, Timex/Sinclair 1000 |
| Areas | Two programs to approximate the area under a curve to either the x or y axis using Simpson’s rule and the trapezoidal rule. Plug in your equation along with two constraints. 2K. | Timex/Sinclair 1000 |
| Arithmetic and Geometric Progressions | Computes the value and sum of a specified number of terms with a common difference or ratio, starting with the first user-defined term. 2K. | Timex/Sinclair 1000 |
| Astro Map & Conversion | 16K. | Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Astro-Utilities | Calculates Julian date, sidereal time; rise/set times; altitude/azimuth; procession of celestial objects; and more. 16K. | Timex/Sinclair 1000 |
| Astronomer's Guide | Contains astromap, giving access to information on 800 stars and other celestial objects. 16K. | Timex/Sinclair 1000 |
| Astronomer's Guide | Unreleased Timex Computer Corporation version of the Sinclair Research tape of the same name. | Timex/Sinclair 1000 |
| Astronomical Software 1 | Menu-driven program providing date, time and coordinate conversions. 64K. | Timex/Sinclair 1000 |
| Astronomy | Compute positions of the sun, moon and planets for any date. Find dates and times of moon phases, solar and lunar eclipses, sunrise/sunset times, equinoxes/solstices, Julian day and sidereal time. | Timex/Sinclair 2068 |
| Astronomy | Displays all 88 constellations. 16K | Timex/Sinclair 1000 |
| Atan 2K | Timex/Sinclair 1000 | |
| Audio Frequency Counter | Large display. 2K. | Timex/Sinclair 1000 |
| Autotrack: Computer Rotor Control | Antenna rotor controller. WorldTrack software on cassette. Advertised in AMSAT Journal. | Timex/Sinclair 1000 |
| Balance | Calculates point of balance, beam lengths, weights, etc. | Sinclair QL, Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Beam Design | Calculates shear force and moment diagrams for statistically determinant beams with concentrated and uniform loads. Finds normal and shear stresses for given section or section modulus for a given section. 16K. | Timex/Sinclair 1000 |
| Beam Heading | Calculate bearing, miles and kilometers from user’s city to any location in the world. Prints world grid centered on user’s city. | Timex/Sinclair 1000 |
| Belt and Chain Drives | Gives 9 important answers fast. Finds tangents, angles, pitch lengths, arc of contact, ratios, etc. | Sinclair QL, Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Calculus Solver | 16K. | Timex/Sinclair 1000 |
| CAM MASTER | CAD software to design circular cams and generate CNC code to a vertical mill controller. | Sinclair QL |
| Celestial Locator | Provides the amateur astronomer with AZ/ALT positions for any given celestial source. Radio astronomers can rapidly adjust antennas with the location positions provided by this program. Can print monthly positions on RS232 printers via ZX99. 16K. | Timex/Sinclair 1000 |
| CHIP | Integrated circuit inventory program. Hold up to 300 entries with descriptions and quantities. Fast search and sort routines. 64 column file displays. | Timex/Sinclair 2068 |
| Chord/Curve | Finds radius, angle, arc and chord lengths, sector and segment areas. Gives angle in degrees and radians. | Sinclair QL, Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Circuit Analysis | 16K. | Timex/Sinclair 1000 |
| Common-Emitter Transistor Amplifier | Design and analysis of common-emitter transistor amplifiers. Biasing, stability, frequency response, input/output resistances, power dissipation, and thermal effects taken into account. Prints schematic and Hybrid-Pi equivalent circuit, stores up to five different transistor spec sheets. 16K. | Timex/Sinclair 1000, Downloadable |
| COMPU-STAT | General statistics program. Calculates most descriptive statistics, graphs frequency distribution. Manual gives step-by-step explanations. 16K. | Timex/Sinclair 1000 |
| Computer Navigation | Seven programs for computer navigation. Great circle sailing. rhumb-line sailing, dead reckoning, latitude by noon sight, longitude by time sight, star and planet identification, and sight reduction. 16K. | Timex/Sinclair 1000 |
| Concept 3-D | Three-dimensional CAD program. | Sinclair QL |
| Constellation | Turn your ZX81 into a telescope. Produces a simulation of the night sky as seen from any position on Earth at any chosen time this century. You may point your telescope in any direction, move it up, down, left or right, zoom in or out. Stars may be displayed by magnitude or constellation. 16K. | Timex/Sinclair 1000 |
| Conversions/Functions | Converts decimal degrees to degrees-minutes-seconds plus radians, grads. Gives six trigonometry functions for each input. Answers in one second. | Sinclair QL, Timex/Sinclair 2068 |
| Cryptographics Programs | Five 2K programs for secure communications. Illustrates degrees of message security, including unbreakable random codes. | Timex/Sinclair 1000 |
| Cubic/quadratic Solution | Solution to the cubic and quadratic equation for real coefficients. | Timex/Sinclair 1000 |
| Dates | Shows a month calendar on the TV screen for user specified month in history or the future. Makes dates in history or future more real. What day of the week were you born? What day of the week will your birthday be in 10 years? Documentation describes the calendar as well as builds the program. | Sinclair ZX80, Sinclair ZX81 |
| Differential Equation Solver | 16K. | Timex/Sinclair 1000 |
| Distacalc | Calculates great circle distance and heading from entered latitude and longitude data. File of 250 world cities is updated each time calculation is made on new point. Results given in statute miles, nautical miles, and kilometers. Ideal for radio amateurs and navigators. 16K. | Timex/Sinclair 1000 |
| Drugs and Bugs | Antibiotic selection program for physicians. 16K. | Timex/Sinclair 1000 |
| Dual Trace 'Scope' | 155,000 samples per second with trigger and cursor. | Timex/Sinclair 1000 |
| E.E. | Electronics Engineering software for engineers, technicians, students, hobbyists who wish to learn to use these formulas. Includes Ohm’s law and its ramifications. 16K. | Timex/Sinclair 1000 |
| E.E. 1 Filter Design | Aid for electronic engineers and students in the field of designing filters. Provides information on bandpass, low-pass, or high-pass filters using a menu-driven approach. Plots of all your design criteria are available. 16K. | Timex/Sinclair 1000, Downloadable |
| Electronic Circuit Design Programs | Programs for computer-aided-design of active filters (Bessel, Butterworth, Chebyshev). Also design pads and attenuators; state-variable, staggertuned, and notch filters; amplifiers, 555 timers, yagi antennas; regulators; and heat sink parameters. Many draw schematic on screen. 16K. | Timex/Sinclair 1000 |
| Electronic Programs for the Hobbyist | Programs cover Ohms law, op-amps, bipolar power supply design. | Timex/Sinclair 1000 |
| Electronics | Use your computer in your electronics work. Ohm’s law and power dissipation, resistor/capacitor network calculations, astable/monostable 555 timer circuit, transistor amplifiers, power supplies, and other time consuming calculations. | Timex/Sinclair 1000 |
| Electronics Engineer | Menu driven program for the electronics hobbyist or engineer. Covers voltage division, LED voltage dropping, resistor color codes, and Ohm’s Law. | Timex/Sinclair 1000 |
| Electronics Subroutines, Combo II | Capacitive time constants; current power dissipation inductance; Ohms Law; Joules Law; parallel; series resistance; parallel; series capacitance; etc. | Timex/Sinclair 1000 |
| ELF/1 | Electrical/Electronic Formula Program One. With any two of the following: ampere, voltage, or wattage, the third unit of measurement can be found. 16K. | Timex/Sinclair 1000 |
| Ephemeris V | Planet finder. Enter date, time, latitude and longitude. Program will calculate azimuth and altitude, right ascension and declination. Provides graphic display of planet in current constellation and local sideral time to aid in finding stars, comets, nebulae, etc. 16K. | Timex/Sinclair 1000 |
| Equation Solver | Displays each step in the solution of mathematical equations. Works on any level of mathematical proficiency. Also solves unknowns. | Timex/Sinclair 1000 |
| EZ-Filter | Op-amp filter design. 16K. | Timex/Sinclair 1000 |
| Fast Fourier Transform | 16K. | Timex/Sinclair 1000 |
| Frame | Engineering software for frame analysis. Intended for consulting engineers, civil/structural engineers, mechanical engineers and engineering students. | Sinclair QL, Timex/Sinclair 2068 |
| Functional Analysis | Given any function defined in a closed form, the program finds its maximums, minimums, and zeros over a given range of the argument. The function, its derivitive, or its integral may be evaluated at a point and tabulated over a range. 16K. | Timex/Sinclair 1000 |
| Galaxy | Draws normal and barred spiral galaxies from input parameters. Galaxies may have variable orientation from face-on to edge-on. Choice of two spiral algorithms. 16K. | Timex/Sinclair 1000 |
| Graphic Calculator | Turn your computer into a full graphics calculator able to display equation with result. 1K. | Sinclair ZX81, Timex/Sinclair 1000 |
| Grid | Engineering software for grid analysis. Intended for consulting engineers, civil/structural engineers, mechanical engineers and engineering students. | Sinclair QL, Timex/Sinclair 2068 |
| Ham Radio Pak | Special package which includes: POLSAT: calculates minute-by-minute aim-angles for polar orbiting comsats. GEOSAT: calculates the aim-angle to any of the geostationary comsats. DISH: calculates the plotting points for custom radio dishes. | Timex/Sinclair 1000 |
| HAM-AID | Calculate reactance. resonance. resistors in parallel. and evaluate expressions. 2K. | Timex/Sinclair 1000 |
| Hamilton Display | Generates and displays Hamilton paths on a forgetful functional representation of a 4-dimensional cube. 16K. | Timex/Sinclair 1000 |
| Hamilton Path Generator | Generates paths along edges through each corner once on hypercubes. Listing, 2K. | Timex/Sinclair 1000 |
| Hamware | 5 programs for ham radio operators. Covering circuit design ac and dc, impedance, frequency, and antenna design. 1K. | Timex/Sinclair 1000 |
| Heating and Air Conditioning Simulation | Analyzes large buildings. Calculates annual heating and cooling consumption based onhourly weather, design, schedule inputs; lighting, fans, pumps; multiple zone buildings; what-if situations. Requires 32K RAM. | Timex/Sinclair 1000 |
| Hyperbolic Spiral | Listing. 1K. | Sinclair ZX81, Timex/Sinclair 1000 |
| Hypercycloids | Listing. 1K. | Sinclair ZX81, Timex/Sinclair 1000 |
| Intermediate Math Pack | Compute primes, GCD, LCM. any base conversion, roots of functions, triangle solutions, linear regression, simultaneous equations, determinants, vector operations. 2K. | Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Ionisation | Plots ionisation energies for input groups/periods as required for chemistry courses. Important patterns are shown graphically. 10-12th grade. 16K. | Timex/Sinclair 1000 |
| Lab Assistant | Scientific reference and teaching program. Includes curve fitting of peaks and valleys, periodic table with atomic weights and numbers plus orbitals and more, molarity/normality, PPM/weight converter, metric converter. 16K. | Timex/Sinclair 1000 |
| Lab Program 2000 | Complete environmental laboratory program. Features tabular printout of BOD, COD, MLSS/MLVSS/SCI, total suspended solids, total solids, BOD/COD correlation statistics. Available as two 16K TS 1000 programs or one TS 2068 program. | Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Lab Program I | Computes CODs, BODs, MLSS/MLVSS/SVI, total suspended solids, total solids. Will run 20 samples in each category. | Timex/Sinclair 1000 |
| Lab Program II | Two interactive parts: COD and BOD/COD correlation. Will compute COD, estimated BOD, sample sizes for BOD analysis, expected high and low BOD range. | Timex/Sinclair 1000 |
| LCM & HCF, Prime factors, Statistics, Bar-chart plotter | Math programs for the 1K ZX80. | Sinclair ZX80 |
| Lemniscate of Bernoulli | Listing. 1K. | Sinclair ZX81, Timex/Sinclair 1000 |
| Levers | Solves for three most common types for forces, fulcrum point, lever length and more. | Sinclair QL, Timex/Sinclair 2068 |
| Limacons | Listing. 1K. | Sinclair ZX81, Timex/Sinclair 1000 |
| Linear Programming | 1K. | Sinclair ZX81, Timex/Sinclair 1000 |
| Linear Regression | 1K. | Sinclair ZX81, Timex/Sinclair 1000 |
| Linearsystems3.0 | Solves set of linear system equations of up to twenty real, or ten complex-valued unknowns. Uses Gaussian elimination with partial pivoting to minimize effects of round-off error. Returns measure of sensitivity of solution to element value perturbations. 16K. | Timex/Sinclair 1000 |
| Linreg4.0 | Accepts up to 99 pairs of data points and computes parameters of straight line having best Least-Mean-Square fit to data. Menu selected operations enter data, compute and display parameters, compute and display RMS error and correlation co-efficient, and calculate y-values from input x-values using linear equation. 16K. | Timex/Sinclair 1000 |
| Lissajous Figures | Listing. 1K. | Sinclair ZX81, Timex/Sinclair 1000 |
| Lunar Cycle | Approximation for determining the lunar phase for any day this century; accuracy usually within 1 day; rarely over 3 days. 2K. | Timex/Sinclair 1000 |
| Magic Cube Generator | Generates four by four magic cubes. Listing, 16K. | Timex/Sinclair 1000 |
| Math #1 | Metric: 21 menu selectable conversions; Bascon: computer math base conversion. | Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Math and Electronics | 6 programs. Resonate Circuits: Series and parallel calculations. Geometry: Areas, volumes, perimeters of 22 shapes. Graphic Trig: Plots X-Y data, prints angles and hypotenuses. Ohm’s Law (DC): Voltage, amperage, resistance, and power. PI and T Networks: Impedance matching and attenuators. Temperature conversion: Fahrenheit and Celsius. 16K. | Timex/Sinclair 1000 |
| Math Pak | Math routines and fit, variance analyzer, statistics and RPN calculator. 16K. | Timex/Sinclair 1000 |
| Math Routines and FIT | General purpose mathematics program for calculating factorials, permutations, and combinations, for solving quadratic and cubic interpolations, and for plotting fitted curves of 4 different functions. 16K. | Timex/Sinclair 1000 |
| Mathematics of Higher Order, Combo IV | Arithmetic progression; area of common figures; complex variables and operations: exponents; derivatives; logarithms; factorials; etc. | Timex/Sinclair 1000 |
| Mathstat Pac | Four programs. Statistics: computes mean, variance and standard deviation. Linear Regression: computes regression coefficients and displays equation. Vector Math: adds two vectors and provides resultant vector. Simultaneous Equation Solver: solves system of simultaneous equations. | Timex/Sinclair 1000 |
| MATMAN | Performs all standard matrix functions including input editing. | Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Matrix Math | 16K. | Timex/Sinclair 1000 |
| MATSOL | Solve any number of simultaneous equations; uses Gaussian elimination with partial pivoting for a fast solution. | Timex/Sinclair 1000 |
| Mechanical Design Programs | Solutions of machine design problems. | Timex/Sinclair 1000 |
| Mega-Stat | Perform sophisticates statistical analyses on business and personal data. Accepts data via keyboard or tape. Plots in graphic and digital statistical forms. 16-64K. | Timex/Sinclair 1000 |
| Microkjeldahl Protein Determination | Calculates total nitrogen (dry basis) in MG/100G and percent protein (dry or wet basis) for up to 50 items. | Timex/Sinclair 1000 |
| MinimUF 3.5 | Minimum usable frequency radio propagation program. | Timex/Sinclair 1000 |
| Moisture-Oven Method | Helps with computation of moisture content of food and agricultural materials. Accepts raw data from which a table of moisture contents is printed. | Timex/Sinclair 1000 |
| Moontracker | Computes position of moon, rising and setting, for any location, any time. 16K. | Timex/Sinclair 1000 |
| MOPSY | Matrix Operations Programming System. Applications to solve systems of equations, polynomial interpolations, statistical analysis, heat transfer, electrical circuit analysis, animal population studies and more. 16K. | Timex/Sinclair 1000 |
| Morse Code Translator | Reads Morse code through cassette port and scrolls translated message across screen. Translates code off the air through earphone jack. Generates code from a character string for recording or hearing through TV speaker. Enter message in English and out comes Morse code. 2K. | Timex/Sinclair 1000, Downloadable |
| Morse Code Translator | Accepts tone decoder input, outputs English on the TV screen or printer. Full screen display, auto scrolling. 5K buffer. Unique built-in signal reader aids in detecting/reducing noise from the system. This program is a great tool for learning Morse code. Requires Universal I/O Port. | Timex/Sinclair 2068 |
| Morseman 3 | Morse displayed as alphanumerics on screen. Training aid; practice for speed and accuracy. Automatic decode option for Morse received by radio with suitable interface. Decode, generation of preset messages, random generation for training. Speeds to 40 wpm. | Timex/Sinclair 1000 |
| Multiple Linear Regression | Computes correlation matrix, its inverse, regression coefficients, ANOVA, multiple R and coefficient of determination for up to 15 independent variables and 30 observations. | Timex/Sinclair 1000 |
| Multiple Regression | Listing. 16K. | Timex/Sinclair 1000 |
| Multiple Regression Analysis | Max or min up to 48×48 tableau. Tableau must be in standard form. 16K. | Timex/Sinclair 1000 |
| MXP | Stores and manipulates complex formulas without programming. Solves equations, function plotting. User-definable functions, engineering (MXP-E), physics (MXP-P), graphs (MXP-O) and math (MXP-M) add-on modules available. 16K. | Timex/Sinclair 1000 |
| Numerint4.0 | An adaptive quadrature numerical integration routine based upon a Newton-Cotes eight panel formula. Sub-interval sizes automatically adjust to meet accuracy requirements, thereby greatly enhancing the routines efficiency. User supplies integrand function as subroutine. Returns indicator of solution reliability. 16K. | Timex/Sinclair 1000 |
| Oblique Trigonometry | Solves all non-right angle trigonometry. | Sinclair QL, Timex/Sinclair 2068 |
| Orbit | Astronomical demonstration program for educators. Draws elliptical orbit shapes based on eccentricity. Also calculates and produces animated display of orbital motion. 16K. | Timex/Sinclair 1000 |
| Passive Solar Design Pack | Calculates heat loss, solar gain, solar fraction, storage mass. | Timex/Sinclair 1000 |
| PC-DRAW | Allows user to design detailed printed circuit board artwork which can be printed and photographed to produce a negative for circuit etching. Circuit is drawn with joystick. Supports all popular printer interfaces and configured for Epson compatible printers. | Timex/Sinclair 2068, Downloadable |
| Physics Solver | 16K. | Timex/Sinclair 1000 |
| PINS | Integrated circuit pinout directory. Store pinout information for any chip up to 40 pins. Fast look up ICs by number or descriptio, and draw the chip on screen with all pin labels and notes. | Timex/Sinclair 2068 |
| Pipe Flow | Calculates the Reynolds number and friction factor for a given flow condition. Finds the head loss in piping systems which include straight pipe, bends, valves, contractions, and enlargements. 16K. | Timex/Sinclair 1000 |
| Plane Frame | Modeling for engineers. An excellent tool for the professional engineer or an example of state-of-the-art matrix structural analysis for students. A typical database can contain 12 joints, 14 spans, and 7 sections. 16K. | Timex/Sinclair 1000 |
| Plane Frame | Structural analysis program to determine movement and internal forces generated by external loading on a two dimensional frame. Based on the stiffness method of matrix structural analysis; output formatted for screen and printer. 16K. | Timex/Sinclair 1000 |
| Planet Finder | Planet Finder is a collection of astronomical images and information. It is a graphically interesting, cleverly designed visual database of solar system facts, celestial bodies and planetary configurations. | Timex/Sinclair 2068, Downloadable |
| Planetfinder | Computes the right ascension and declination, constellation planet is in v brightness, distance from earth, angular diameter, and phase. For any planet, any date. 16K. | Timex/Sinclair 1000 |
| Planets | Calculates and displays positions of the planets around the sun for a date or series of dates. Can plot planet distances to scale and include a comet. 16K. | Timex/Sinclair 1000 |
| Power Supply CAD | Computer-aided design tool. Automatically calculate component and circuit values for power supplies. | Timex/Sinclair 1000 |
| Prime Numbers | Generates primes from 3 to 10 million. Checks numbers for primes. Listing. 1K. | Sinclair ZX81, Timex/Sinclair 1000 |
| Print-Planets | Uses the high resolution capabilities of the ZX printer to plot the positions of the planets in their orbits. Menu driven with 4 plotting options. Orbits are delineated and planets are plotted with their astronomical symbols. 16K. | Timex/Sinclair 1000 |
| Pseudoscope for TS2068 | A serial bit stream analyzer which mimics the action of an oscilloscope. Use to graphically portray low frequency digital signals in a horizontal scrolling graph. Program lets you store and compare samples. Print them out on a 2040 printer. Adjustable sample rate, 60hz timing dots are plotted with your input sample. Pseudoscope lets you see | Timex/Sinclair 2068 |
| Pulleys and Wheels | Finds the required force, diameters, lift, weights, etc. | Sinclair QL, Timex/Sinclair 2068 |
| Radiobeacon Qwikplot | Immediate indication of position obtained from either 2 or 3 RDF bearings. In the latter case, fixed marker indicates median position; flashing plot point shows the limits of the “cocked-hat” indicating the likely accuracy of the observations. | Timex/Sinclair 1000 |
| Relativity | Graphically demonstrates effects of relativistic velocities on length of a spacecraft plus time dilation effects. Demonstrates the “twin paradox” on trips to Alpha Centauri and the Andromeda Galaxy. | Timex/Sinclair 1000 |
| Rhodonea (Rose) Curve | Listing. 1K. | Sinclair ZX81, Timex/Sinclair 1000 |
| RPN Calculator | Scientific calculator emulation using reverse polish notation. Features include: 50 storage registers, a visible stack, statistical functions, and a key to save a calculation in progress. 16K. | Timex/Sinclair 1000 |
| Sci-Pak | A full range of math functions. Graphing, curve fitting, simultaneous equations, polar coordinates, more. | Timex/Sinclair 1000 |
| SIFT I | Statistical Interactive system for the Timex/Sinclair 1000 and ZX81 computers, Vol I. Sixteen 2K statistical routines such as: Linear and Multiple Linear Regression with transformations; One-Way, Two-way and Latin Square Analysis of Variance; and T-tests, plus other Non-Parametric two sample tests. A user’s manual (82 pages) with worked out examples and interpretation is included. 2K. | Timex/Sinclair 1000 |
| SIFT II | Statistical Interactive-Analysis for Timex Computers, Vol. II. Twenty statistical routines: plots, regressions, analyses of variance, sample tests, correlation analyses, and probabilities. 120 page manual. 16K. | Timex/Sinclair 1000 |
| Simplex Algorithm | Gives coefficients for up to 10 variables (up to 100 observations per variable). Also gives F statistic for dependent variable. T statistic for each coefficient (and constant term) coefficient of determination and standard deviation of dependent variable. 16K. | Timex/Sinclair 1000 |
| Small User's Math (SUM) | Compendium of numerical programs for the small system user. Equations to handle first and second order differential equations, matrix eigenvalue/vector solution, curve fitting and cubic spline routines, determinants, matrix inversions, Laplace/Poisson equation, heat or molecular diffusion and more. | Timex/Sinclair 1000 |
| Speed of Sound Calculator | Gives speed simultaneously in ft/sec. MPH, knots with only a user input of the ambient air temperature at the desired altitude. | Timex/Sinclair 1000 |
| Spiral of Archimedes | Listing, 1K. | Timex/Sinclair 1000 |
| Spur Gear Drives | Calculates gear sizes, number of teeth, ratios and more. Gives 14 answers in two seconds. | Sinclair QL, Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Stars | A simple program that randomly scatters a group of characters on the screen to produce interesting pictures. Using a “*” or “.”, the results look like stars. Other symbols can be used to produce forests, maps, or crazy signs. | Sinclair ZX80, Sinclair ZX81 |
| Stat Master | Provides most useful descriptive operations on your data files. Variances, co-variance, standard deviation, standard error, chi-square, hypothesis testing, confidence intervals, all means. 16K. | Timex/Sinclair 1000 |
| Statistical Correlation | Multiple regression program. Accepts up to 10 variables, computes, and prints to standard printer. Min, max, mean, SD, simple correlation matrix, multiple correlation with stepwise drop-out routine, F-values and probability. | Timex/Sinclair 1000 |
| Statistical Graph Generator | Generate graphs for budgets, investments, etc. Includes self-centering titles and dates, automatic calculation of scaler. Supports both TS 2040 and CAI printers. | Timex/Sinclair 1000 |
| Statistical Pac | Four statistics programs. Chi-square (goodness of fit) calculations, analysis of a data set including hypothesis testing and confidence intervals, comparison of two data sets using hypothesis testing and confidence intervals, and simple linear regression including t-value and R2. 16K | Timex/Sinclair 1000 |
| Statistical Programs | Regression, ANOVA, Complete Block, Randomized Block, and Latin Squares. | Timex/Sinclair 1000 |
| Statistics | Three statistics programs. Programs compute current mean and standard deviation, regression, and trend. 1K. | Sinclair ZX81, Timex/Sinclair 1000 |
| Statistics | 1K. | Sinclair ZX81, Timex/Sinclair 1000 |
| Statistics | Statistical analysis and data display. 1 variable with histogram or 2-or-more variables with plot. Results include: sum, variance, standard deviation, error, means, skewness and kurtosis. 16K. | Timex/Sinclair 1000 |
| Statistics Pack | Force, moment, couple, friction, vectors, US-SI conversions. | Timex/Sinclair 1000 |
| Statistics Package | Four programs with error-correcting facilities to compute statistics. Can compute mean, standard deviation, variance, correlation coefficient, regression, equation, confidence interval for mean, 3 applications of the “t” test and the “F” test of the ratio between independent sample variances. 1K. | Sinclair ZX81, Timex/Sinclair 1000 |
| Statistics Programs | Book $12.95, 6 cassettes $17.95 | Timex/Sinclair 1000 |
| Steel Beam Design | Calculates and displays the required steel beam (W-section) based on input of span, load and loading type. 12 options of beam type and loading. 16K. | Timex/Sinclair 1000 |
| Sunrise/Sunset | Complete months or years of tables for sunrise/sunset times every 3 days for any location and time zone. | Timex/Sinclair 1000 |
| Suntracker | Computes position of sun, sunrise, sunset for any location, any time. 16K. | Timex/Sinclair 1000 |
| Super Fn Plot | Plots any function in the form y=f(x); draws it to the correct vertical scale on screen. Plots are white on black background. Compiles a machine code routine to plot same function at high speed. 2K. | Timex/Sinclair 1000 |
| Super-Stats | Statistical tools. Includes mean, standard deviations, Pearson R coeffecient of correlation, Chi square, etc. 16K. | Timex/Sinclair 1000 |
| Surveyors Travers Correction | Adjusts angles turned, bearings, error of closure, area of plot, for closed, loop travers. | Timex/Sinclair 1000 |
| Telescope Design | Asks for desired objective diameter and f/ratio, inputs physical dimensions and optical data for a Newtonian reflector optical assembly. Saves hours of calculation. 2K. | Timex/Sinclair 1000 |
| Temperature Conversion | 1K. | Sinclair ZX81, Timex/Sinclair 1000 |
| The Calculus | Sophisticated programs for numerical integration, differentiation, 1, 2, 3rd derivatives of function, 1st & 2nd differential equations by Runge-Kutta and Adams-Moulton methods. 2K. | Timex/Sinclair 1000, Timex/Sinclair 2068 |
| The Matrix Package | Four separate topics of matrix multiplication, addition, subtraction, and transformation of user-defined matrices. 2K. | Timex/Sinclair 1000 |
| Theile Cabinets | Complete program for designing/testing bass and subwoofer speaker cabinets. Includes simplified measurement procedures and 2 unique alignments for very small bass cabinets. | Timex/Sinclair 1000 |
| Timber Beam Design | Calculates the section modulus and chooses timber beam to comply, then checks the horizontal shear of the selected beam and revises if necessary. 3 options of beam type and loading. Choice of timber grade and allowable stress. 16K. | Timex/Sinclair 1000 |
| Trigonometry | Solves right triangle problems fast. | Sinclair QL, Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Truss | Engineering software for truss analysis. Intended for consulting engineers, civil/structural engineers, mechanical engineers and engineering students. | Sinclair QL, Timex/Sinclair 2068 |
| Variance Analyzer | A data analysis program for examining 1- or 2- way AOV and 2-way AOCOV. Includes: degrees of freedom, sums of squares and products, and means. 16K. | Timex/Sinclair 1000 |
| VDAQ1 | Votem Data Acquisition – Hi-Res. Written VOTEM, a simple voltage-to-frequency converter, designed for single-channel analog data acquisition. Allows multi-screen acquisition, variable scale and timebase. Without the VOTEM, it was useful for frequency measurement, via the tape input jack. 16K. | Timex/Sinclair 1000, Downloadable |
| Vectors and Hyperbolics Functions, Combo III | Hyperbolic functions; dot and cross product of vectors; vector addition and subtraction; etc. | Timex/Sinclair 1000 |
| Weather Forecaster | Requires barometer. Forecast 36 hours in advance. 16K. | Timex/Sinclair 1000 |
| Weight Calculations | 25 metals, 11 woods, 11 other materials. Varied shapes in all sizes. Fast answers. | Sinclair QL, Timex/Sinclair 2068 |
| Wire and Metal Rod | Calculate quantities, costs, weights. | Sinclair QL, Timex/Sinclair 2068 |
| World's Most Magic Square | 8×8 and 16×16 magic squares. Listing. 1K. | Sinclair ZX81, Timex/Sinclair 1000 |
| ZQ-1 | Electronics calculator. Calculates: Ohm’s law for DC, X, Z, real and effective power and power factor. X of C, X of L, X total. Z series or parallel and phase angle. Circuit “0” series or parallel, loaded or unloaded. Circuit resistance at resources, series or parallel. Solenoid coil design. In any routine, give it any | Timex/Sinclair 1000 |
| ZX Forecasting | Forecasting software with a number of methods. Includes moving averages, weighted moving averages, linear exponential smoothing, quadratic exponential smoothing, trend analysis, length-squares regression, correlation co-efficient, co-efficient of determination, standard error of estimate, mean, student deviation. 16K. | Timex/Sinclair 1000 |