I'm pretty sure all the NS* calls and references in MacOS are from NextSTEP.
Yes, but it's not like this is some hidden legacy stuff, that you're not supposed to encounter. This is part of the public macOS API: https://developer.apple.com/documentation/appkit/nstext
Every AppKit and Foundation type uses the NS prefix, and will keep doing so for any foreseeable future. New NS types are added to these frameworks each macOS release.
alt Hacker News
Yes, but it's not like this is some hidden legacy stuff, that you're not supposed to encounter. This is part of the public macOS API: https://developer.apple.com/documentation/appkit/nstext
Every AppKit and Foundation type uses the NS prefix, and will keep doing so for any foreseeable future. New NS types are added to these frameworks each macOS release.