ALGOL 68C was later used for the CHAOS OS for the capability-based security CAP computer at University of Cambridge in 1971.
Garbage collection was added, and the code base is still running[clarification needed] on an emulated OS/MVT using Hercules.
This ability to interpret or compile ZCODE encouraged the porting of ALGOL 68C to many different computing platforms.
A very early predecessor of this compiler was used by Guy and Bourne to write the first Game of Life programs on the PDP-7 with a DEC 340 display.
Here is an extract from the Unix 7th edition manual pages:[4] Below is a sampling of some notable extensions:[5] Separate compilation in ALGOL 68C is done using the ENVIRON and USING clauses.