The ADS QM code is written in Forth-83 language and is thought to be compiled with the Forth5 cross-compiler from MicroProcessor Engineering Limited (MPE). The source code relies on the RAM-Forth kernel delivered with the compiler. For the available words please check the compiler documentation. Helpful are also the books Starting Forth (ISBN 0-13-843079-9) and Thinking Forth (ISBN 0-935533-00-1), both from Leo Brodie.