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Re:A 28-byte “hello, world” program assembled with DEBUG.EXE... by rrwo on Monday October 31, 2022 @05:19AM (#33403520)
If I recall correctly, the COM (stands for something like "COre Memory image") file format is limited to 64k, and was intended to be loaded into the same memory location.

It dates back to CP/M days.

Re:A 28-byte “hello, world” program assembled with DEBUG.EXE... by IncRnd on Monday October 31, 2022 @12:11PM (#33407825)
Before that, on vax, COM files were text files that contained commands to execute.