| 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 |
| 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 |
| Permutations and Combinations | Orders up to 33 items in one group. 2K. | Timex/Sinclair 1000 |
| The Matrix Package | Four separate topics of matrix multiplication, addition, subtraction, and transformation of user-defined matrices. 2K. | Timex/Sinclair 1000 |
