We built and shipped educational software to schools in the 80s and 90s; starting with homecomputers and pcs and later on (of course) only pcs. Good times sending stacks of disks off with the postal service. We also, starting late 80s (running on an msx2), had a BBS which was written by me so it had the licensing/logistics/accounting in there; barely anyone used it for getting their software, but we used it ourselves for mostly everything.

Good times; not having to worry about library versions/updates was nice actually. Besides turbo Pascal (later delphi), we had no 3rdparty dependencies up until we sold the company.