| Astronomical Algorithms on the ZX81 | Examples of astronomical algorithms from More Uses for Your Timex/Sinclair 1000: Astronomy on Your Computer. | Sinclair ZX81, Type-in program |
| Drawing a Line | Code that implement’s Bresenham’s line algorithm in C and BASIC for the ZX81. | Sinclair ZX81, Type-in program |
| Editorial | Introduction from Tim Swenson, author and publisher. Describes goals and scope of the e-zine. | |
| MicroSync Services | Brief article about “Sinclair’s Exclusive Authorized Service Center.” | Sinclair ZX81 |
| Plotting with Z88dk | Describes how to add ZX BASIC PLOT/UNPLOT commands to the Z88dk C compiler. | Sinclair ZX81 |
| The ZX80 and ZX81 in the USA | Background about Sinclair Research Ltd., its entry into the United States marketplace, and its first two computers. | Sinclair ZX80, Sinclair ZX81 |
| ZX81 Basic Compilers | Overview of several compilers available in the early 1980s for the ZX81, including ZX Autocoder, MCODER, ZXpress, and The ZX Compiler. | Sinclair ZX81 |
