Microsoft wrote the Basic implementations for most of the early consumer microcomputers. Commodore's microcomputers, Apple II, IBM PC, and others all had a Microsoft Basic implementation built into ROM.

apparently you can run the following on a commodore shell for a Microsoft easter egg:

    WAIT 6502,0

Cute, but it would be super annoying these days if a platform vendor picked some otherwise completely legitimate value out of an API's parameter domain and used it for an easter egg...

(Yes, you can wait for a value in any of 65,535 memory locations... but not this one, because we needed an easter egg...)

Unfortunately that command is not supported in [0]. What does it do?

[0] https://virtualconsoles.com/online-emulators/c64/

It seems like it was only in Commodore PET Basic. It would print `MICROSOFT!`

https://www.c64-wiki.com/wiki/Microsoft#Easter_Egg_.28Micros...