Some clarification on NeXT as I ramble on about all things NeXT, what would become "Mac OS X" (now "macOS"), and a harbinger of what was to come.

Links:

https://en.wikipedia.org/wiki/NeXTSTEP

https://en.wikipedia.org/wiki/NeXT_Computer#Legacy

https://en.wikipedia.org/wiki/OpenStep

https://en.wikipedia.org/wiki/Rhapsody_(operating_system)

https://en.wikipedia.org/wiki/Darwin_(operating_system)

https://en.wikipedia.org/wiki/A/UX