The application software is normally written in high level language, such as "C", using an IBM or compatible microcomputer, then compiled and burn­ed into EPROMS for installation in the SBC-200B. Battery backed 8 K RAM chips are used to handle 5 by 5 array keypad with numeric and special dynamic memory data. The software can be written by us, by you, or by a third party; we offer a library of commonly used subroutines in the "C" language for those who wish to write and support their own programs.