This package is a PDP-8 simulator that runs across the Rainbow series. It contains four executable files being ASSEMBLE: assemble PDP-8 source text, EXEC8: execute assembler output, TRACE8: debug + trace program, ASSMBLGO: Complete and comprehensive documentation exists in the form of a textbook, INTRODUCTION TO COMPUTER SYSTEMS, author: N.A.B GRAY, published by PRENTICE HALL of AUSTRALIA, ISBN 0-13-480386-8. This book and associated software forms the basis of a single semester course in computer science at the University of Wollongong, NSW, AUSTRALIA. The text itself makes excellent reading taking a novice assembly language programmer from the basic ALU operations through to Interupt driven IO. The package implements a simulated disk,keyboard,AtoD converter and teletype. This hardware exists as MSDOS files on the default drive. Although the textbook comes highly recommended, an experienced computer user and/or programmer should have no trouble assembling and running PDP-8 sources as most programs are user friendly and the programs respond to a ? with a summary of valid user input. The original source code was developed on the Unix opsys, modified for the IBMPC and finally coerced to a PC100A. Included are various example programs for assembly and execution. The programs are considered public domain software and full waverer of any copyrights is documented in ISBN 0-13-48036-8.I hope you find these programs interesting and useful. I also highly recommend RB-108 from the DECUS library to run the CP/M-86 text editor RED for source code generation. Address for any correspondance: GLENN M. HINCHEY, P.O. BOX 649. MIRANDA, 2228. SYDNEY, AUSTRALIA.