Well it had to have been on disk or tape at some point. It wasn't all typed in by hand every time they needed to build a new version.

unless they used punch cards

Punch cards are still a form of digital storage, mind.

WalterBright 2 hours ago | parent | prev | next [-]

I threw out all my punch cards. Wish I'd kept at least a listing!

andsoitis 3 hours ago | parent | prev [-]

> unless they used punch cards

For MS-DOS?

Not likely. Punch cards disappeared around the end of 1976.

	▲	Anonyneko 7 minutes ago \| parent [-]
		We still used them in the university as late as in 2010... ...as writing paper.