The ZX81, equipped with its 16K RAM pack, has at least as much storage as most other microcomputers. It uses the same Z80A CPU that is featured in many of the best microcomputer systems and which, in other machines, can run wages, stock control and word processor systems. So why not in the ZX81?

The aim of this book is to push the ZX81 a long way in the direction of 'serious' applications, but without the use of machine code. All the programming is easy to follow and fully explained, so that the reader learns, a step at a time, how complex programs are constructed and written.

But these programs are just a beginning. Discard the belief that the ZX81 is too small for real computing work, and use the flexible techniques described here to fill your own special data processing needs.