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.

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.

TS 1000

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.

TS 1000

Frequency response, op-ampsn, NPN transistors, FETs, transmission lines, open/short stubs, RLC circuits. 16K.

TS 1000

TS 1000 TS 2068

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.

TS 1000

Computer-aided design tool. Automatically calculate component and circuit values for amplifiers.

TS 1000

For FM, HAM, and TV antennas. Design your own or modify your current antenna to optimize the reception in your specific location.

TS 1000

Design your own cubical quad, yagi beam or inverted Vee antenna for ham or CB radio.

TS 1000

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.

ZX81 TS 1000

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.

TS 1000

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.

TS 1000

Calculates Julian date, sidereal time; rise/set times; altitude/azimuth; procession of celestial objects; and more. 16K.

TS 1000

Contains astromap, giving access to information on 800 stars and other celestial objects. 16K.

TS 1000

Unreleased Timex Computer Corporation version of the Sinclair Research tape of the same name.

TS 1000

Menu-driven program providing date, time and coordinate conversions. 64K.

TS 1000

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.

TS 2068

TS 1000

Antenna rotor controller. WorldTrack software on cassette. Advertised in AMSAT Journal.

TS 1000

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.

TS 1000

Calculate bearing, miles and kilometers from user’s city to any location in the world. Prints world grid centered on user’s city.

TS 1000

Gives 9 important answers fast. Finds tangents, angles, pitch lengths, arc of contact, ratios, etc.

TS 1000 TS 2068 QL

CAD software to design circular cams and generate CNC code to a vertical mill controller.

QL

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.

TS 1000

Integrated circuit inventory program. Hold up to 300 entries with descriptions and quantities. Fast search and sort routines. 64 column file displays.

TS 2068

Finds radius, angle, arc and chord lengths, sector and segment areas. Gives angle in degrees and radians.

TS 1000 TS 2068 QL

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.

Downloadable TS 1000

General statistics program. Calculates most descriptive statistics, graphs frequency distribution. Manual gives step-by-step explanations. 16K.

TS 1000

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.

TS 1000

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.

TS 1000

Converts decimal degrees to degrees-minutes-seconds plus radians, grads. Gives six trigonometry functions for each input. Answers in one second.

TS 2068 QL

Five 2K programs for secure communications. Illustrates degrees of message security, including unbreakable random codes.

TS 1000

Solution to the cubic and quadratic equation for real coefficients.

TS 1000

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.

ZX80 ZX81

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.

TS 1000

Electronics Engineering software for engineers, technicians, students, hobbyists who wish to learn to use these formulas. Includes Ohm’s law and its ramifications. 16K.

TS 1000

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.

Downloadable TS 1000

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.

TS 1000

Programs cover Ohms law, op-amps, bipolar power supply design.

TS 1000

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.

TS 1000

Menu driven program for the electronics hobbyist or engineer. Covers voltage division, LED voltage dropping, resistor color codes, and Ohm’s Law.

TS 1000

Capacitive time constants; current power dissipation inductance; Ohms Law; Joules Law; parallel; series resistance; parallel; series capacitance; etc.

TS 1000

Electrical/Electronic Formula Program One. With any two of the following: ampere, voltage, or wattage, the third unit of measurement can be found. 16K.

TS 1000

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.

TS 1000

Displays each step in the solution of mathematical equations. Works on any level of mathematical proficiency. Also solves unknowns.

TS 1000

Engineering software for frame analysis. Intended for consulting engineers, civil/structural engineers, mechanical engineers and engineering students.

TS 2068 QL

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.

TS 1000

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.

TS 1000

Turn your computer into a full graphics calculator able to display equation with result. 1K.

ZX81 TS 1000

Engineering software for grid analysis. Intended for consulting engineers, civil/structural engineers, mechanical engineers and engineering students.

TS 2068 QL

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.

TS 1000

Calculate reactance. resonance. resistors in parallel. and evaluate expressions. 2K.

TS 1000

Generates and displays Hamilton paths on a forgetful functional representation of a 4-dimensional cube. 16K.

TS 1000

Generates paths along edges through each corner once on hypercubes. Listing, 2K.

TS 1000

5 programs for ham radio operators. Covering circuit design ac and dc, impedance, frequency, and antenna design. 1K.

TS 1000

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.

TS 1000

Compute primes, GCD, LCM. any base conversion, roots of functions, triangle solutions, linear regression, simultaneous equations, determinants, vector operations. 2K.

TS 1000 TS 2068

Plots ionisation energies for input groups/periods as required for chemistry courses. Important patterns are shown graphically. 10-12th grade. 16K.

TS 1000

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.

TS 1000

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.

TS 1000 TS 2068

Computes CODs, BODs, MLSS/MLVSS/SVI, total suspended solids, total solids. Will run 20 samples in each category.

TS 1000

Two interactive parts: COD and BOD/COD correlation. Will compute COD, estimated BOD, sample sizes for BOD analysis, expected high and low BOD range.

TS 1000

Solves for three most common types for forces, fulcrum point, lever length and more.

TS 2068 QL

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.

TS 1000

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.

TS 1000

Approximation for determining the lunar phase for any day this century; accuracy usually within 1 day; rarely over 3 days. 2K.

TS 1000

Metric: 21 menu selectable conversions; Bascon: computer math base conversion.

TS 1000 TS 2068

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.

TS 1000

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.

TS 1000

Arithmetic progression; area of common figures; complex variables and operations: exponents; derivatives; logarithms; factorials; etc.

TS 1000

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.

TS 1000

Solve any number of simultaneous equations; uses Gaussian elimination with partial pivoting for a fast solution.

TS 1000

Perform sophisticates statistical analyses on business and personal data. Accepts data via keyboard or tape. Plots in graphic and digital statistical forms. 16-64K.

TS 1000

Calculates total nitrogen (dry basis) in MG/100G and percent protein (dry or wet basis) for up to 50 items.

TS 1000

Helps with computation of moisture content of food and agricultural materials. Accepts raw data from which a table of moisture contents is printed.

TS 1000

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.

TS 1000

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.

TS 1000

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.

TS 2068

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.

TS 1000

Computes correlation matrix, its inverse, regression coefficients, ANOVA, multiple R and coefficient of determination for up to 15 independent variables and 30 observations.

TS 1000

Max or min up to 48×48 tableau. Tableau must be in standard form. 16K.

TS 1000

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.

TS 1000

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.

TS 1000

Astronomical demonstration program for educators. Draws elliptical orbit shapes based on eccentricity. Also calculates and produces animated display of orbital motion. 16K.

TS 1000

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.

Downloadable TS 2068

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.

TS 2068

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.

TS 1000

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.

TS 1000

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.

TS 1000

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.

Downloadable TS 2068

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.

TS 1000

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.

TS 1000

Computer-aided design tool. Automatically calculate component and circuit values for power supplies.

TS 1000

Generates primes from 3 to 10 million. Checks numbers for primes. Listing. 1K.

ZX81 TS 1000

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.

TS 1000

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

TS 2068

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.

TS 1000

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.

TS 1000

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.

TS 1000

A full range of math functions. Graphing, curve fitting, simultaneous equations, polar coordinates, more.

TS 1000

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.

TS 1000

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.

TS 1000

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.

TS 1000

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.

TS 1000

Gives speed simultaneously in ft/sec. MPH, knots with only a user input of the ambient air temperature at the desired altitude.

TS 1000

Calculates gear sizes, number of teeth, ratios and more. Gives 14 answers in two seconds.

TS 1000 TS 2068 QL

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.

ZX80 ZX81

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.

TS 1000

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.

TS 1000

Generate graphs for budgets, investments, etc. Includes self-centering titles and dates, automatic calculation of scaler. Supports both TS 2040 and CAI printers.

TS 1000

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

TS 1000

Regression, ANOVA, Complete Block, Randomized Block, and Latin Squares.

TS 1000

Three statistics programs. Programs compute current mean and standard deviation, regression, and trend. 1K.

ZX81 TS 1000

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.

TS 1000

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.

ZX81 TS 1000

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.

TS 1000

Complete months or years of tables for sunrise/sunset times every 3 days for any location and time zone.

TS 1000

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.

TS 1000

Statistical tools. Includes mean, standard deviations, Pearson R coeffecient of correlation, Chi square, etc. 16K.

TS 1000

Adjusts angles turned, bearings, error of closure, area of plot, for closed, loop travers.

TS 1000

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.

TS 1000

Sophisticated programs for numerical integration, differentiation, 1, 2, 3rd derivatives of function, 1st & 2nd differential equations by Runge-Kutta and Adams-Moulton methods. 2K.

TS 1000 TS 2068

Four separate topics of matrix multiplication, addition, subtraction, and transformation of user-defined matrices. 2K.

TS 1000

Complete program for designing/testing bass and subwoofer speaker cabinets. Includes simplified measurement procedures and 2 unique alignments for very small bass cabinets.

TS 1000

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.

TS 1000

Engineering software for truss analysis. Intended for consulting engineers, civil/structural engineers, mechanical engineers and engineering students.

TS 2068 QL

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.

TS 1000

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.

Downloadable TS 1000

Hyperbolic functions; dot and cross product of vectors; vector addition and subtraction; etc.

TS 1000

25 metals, 11 woods, 11 other materials. Varied shapes in all sizes. Fast answers.

TS 2068 QL

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

TS 1000

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.

TS 1000