Shlee fooled around &Our ancestors never imagined having this many tabs open at once.
グレェ「grey」@shlee the computer on which Engelbart's team initially developed NLS (oNLine System) didn't have time-sharing (what would now be referred to as multi-tasking).
Apple DOS: No multitasking.
MS-DOS? No multitasking.
Mac System 1? No multitasking.(Multi-Finder's "task swapping" in 6.0.8 was a g.f.d. awful attempt)
Many OSes couldn't run more than one process/window/app.
TabS? No Way!
Amiga's Workbench (1985, pre-emptive multi tasking, many didn't understand why. Commodore: bankrupt by 1994)