A common internet and twitter shorthand for Microsoft is MS.
Not-so-Microsoft friendly people use “M$”
I just have a good laugh. I remember the days when one used the dollar-sign to denote the variable as a string type:
M$ = "Microsoft"
Thankfully, most modern languages (even those from Microsoft) no longer use this programming language mnemonic (or what is formally known as postfix sigils)
I LOL AT UR L4M3 POSTFIX SIGIL