Wow, look at those luxurious titlebars, windows edges, scrollbars, and tabs! So easy to use.

One other thing lost, their scrollbars kept an indentation of where the bar was until you let go, which was sometimes useful.

Not a fan of the busy backgrounds, but can’t win ’em all.

Does anyone have a screenshot of the window menu (right click on titlebar)? Been looking for the CUA hotkeys related to those window functions. Most still work but are not shown on Linux desktops for some reason.

Someone did a screen capture of a SGI "System Tour" app that explains how a lot of the UI worked:

https://www.youtube.com/watch?v=sg8fiA9TrRk

What is the scrollwheel thing on the left side of some windows?

A blend of nextstep and macos classic somehow.

Even if there isn't any 3rd party code, the whole process of going through the codebase to confirm there really isn't any 3rd party code, and generally getting the legal department to sign off on it, is a lot of work in itself. My impression is that this kind of "historic source" release typically only happens if somebody sufficiently senior in the company cares enough to actively push it through. The default is that nobody does care that much, and it doesn't happen.

"Do nothing" has essentially zero downside for a big company that happens to have something of niche interest like this in its vaults.

> Maybe there's 3rd party code which SGI/HPE licensed?

IIRC, this was one of the complication of open sourcing Solaris back in the day.

An obvious source for 3rd party code is that it’s a real UNIX System V derivative, so the AT&T code would need to be cleared.

A partial but significant dump of 4.1 is easy to find. Probably leaked for/by Apple Network Server people.

Dunno but the repo is 4+ years old.