We used IBM mainframes at work, feeding them punched cards and waiting for a response! For "simple" stuff we had an in-house PC called a National Semiconductor Starplex - taught myself BASIC on that thing and wrote many programs to make life easier for our department! Then we started moving over to the aforementioned IBM PC/XT for a lot of our engineering work. When our designs outgrew the PC we moved to a proprietary system called "Daisy", with a unix-like proprietary OS. Daisy eventually disappeared and we moved to Sun Microsystems workstations running unix. Sun eventually gave way to Dell desktop machines running Red Hat linux. Interestingly, the engineering community was all on linux and the administrative community was all on Windows - and we had to be able to communicate so we had to run VMware in our workstations. I have no idea what they're running today since I've been retired for over 10 years!
At home I started on a TI99 - no monitor and the storage medium was an external audio cassette recorder and cassette tapes! Then we bought an "Adam" - anybody remember them? They came with a floppy drive and a built-in printer. Then we bought an Apple Mac 512, shortly before the Mac + was introduced. Several desktop, and laptop, PCs later - running everything from DOS to Windows 3.11 and up to Windows 8.1 I've now got my laptop running linux Mint Cinnamon, and my wife is using a tablet running Android...
. Betaflight port to 8080 architecture and some very big motors/props and you're in business (just ignore the latency).