==== CHAIN MERGE "filename"[,ln][,DELETE1 nl - 1n2]====
:Loads the specified program from tape or diskdisc, merges it into the program in memory, and starts execution of the merged program. The parameter DELETE1n1 - 1n2 is used to delete part of the original program before running it, if required.
==== CLEAR ====
==== CLOSEIN ====
: Closes any input file (tape or diskdisc).
==== CLOSEOUT ====
: Closes any output file (tape or diskdisc).
==== CLS ====