Toolkit provides a total of nine functions to ease the labour of program writing. After loading, it automatically lowers RAMTOP and sets itself up in the last 2.5K of memory. This is a definite advantage over some other toolkits which require the user to reset RAMTOP before loading - something that can easily be forgotten.

Toolkit's facilities are obtained through USR calls. Prompts are given on the screen and the program is fairly straightforward to use. Special error codes are given to identify the problem if anything goes wrong. The original review cassette contained closely typed instructions on one side of a sheet of A5 size paper. Artic have since improved the packaging and presentation and the instructions are now included on an attractive inlay card.

In common with other utilities of this sort, Toolkit features a very useful renumber routine, but Artic's is both quick and easy to use. The program also contains an impressive range of other programming aids, including facilities to delete groups of lines; to display the amount of memory available; to list the current variables of all string and numerical variables (except arrays and loop control variables) and find any string up to 255 characters in length and list every line in the program containing that string.

The replace command allows any string to be replaced by any other string - e.g. PRINT can be replaced by LPRINT throughout a program. By saving the current program below RAMTOP, another program can be loaded allowing two programs to be joined.

Another useful function is REMKILL, which removes all REM statements. This is especially handy if you are running short of memory or want to speed up loading or saving.

This must be one of the better toolkits around for the ZX81. It is easy to use, executes commands quickly and accurately, and all its functions are likely to have some value for both the novice and for the more experienced Basic programmer. Toolkit takes up only 2K of memory and is quickly loaded which is pretty impressive considering the range of functions available. A highly recommended cassette.