Line printer output following a MAD compiler error on an IBM 704 computer at the University of Michigan, c. 1960

Bob Morris and Doug McIlroy translated that from MAD to BCPL.

- TYPSET and RUNOFF

Programs written in MAD included MAIL, RUNOFF, one of the first text processing systems, and several other utilities all under Compatible Time-Sharing System (CTSS).

- MAD (programming language)
Line printer output following a MAD compiler error on an IBM 704 computer at the University of Michigan, c. 1960

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Preamble of two version of the CTSS scheduler, one in MAD and one in FAP

Compatible Time-Sharing System

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The first general purpose time-sharing operating system.

The first general purpose time-sharing operating system.

Preamble of two version of the CTSS scheduler, one in MAD and one in FAP
Diagram of the Intrex running on CTSS

CTSS had one of the first computerized text editing and formatting utilities, called TYPSET and RUNOFF (the successors of MEMO, MODIFY and DITTO).

CTSS at first had only an assembler, FAP, and a compiler, MAD.