Re: "Windows 95" design?
> So... MS took the same approach and Windows took the Apple menu and upside-downed it (but you could drag it to the top again if you wanted) and smashed it together with the task bar from RISC OS?
Not really.
I have heard this claim before but the original Apple menu was not like that at all.
In the early versions of MacOS (N.B. *not* macOS, i.e. Mac OS X), the Apple menu was not hierarchical, it was not user-customisable, it was not used for launching apps, and it was not used for shutting down the system (that was the Special menu on the end of the menu bar for Finder.)
In 1991, MacOS 7 was a big rewrite, replacing a lot of the assembly-language and Pascal bits with C code, and adding Multifinder. It gained the customisable Apple menu, represented by a nested set of folders inside the System Folder. The Control Panel also became hierarchical, which it wasn't before. System 7 also introduced Aliases, which are something like Unix symbolic links for Classic MacOS, but which contained a machine name and so worked over network connections as well.
Suddenly it became possible to put folders in your Start Menu and fill those folders with aliases pointing to your apps... but I was actively supporting Macs every day back then, and this was _not_ a common thing to do. It was more common to put some aliases to often-used apps on your desktop.
MacOS 8 started to popularise and standardise the use of the Apple Menu to be an application launcher, but it still wasn't a standard feature. It had an automatically-managed "Recent Applications" folder as well as "Recent Documents" but if you wanted to put apps in there, you had to roll your own solution, and it would not be managed by the system.
MacOS 8 came out in 1997 so it post-dates both Windows 95 and Windows NT 4.
This was not something Microsoft copied from Apple. In fact it's closer to the other way round.
The idea of the "icon bar" at the bottom of the screen seems to be something original to Acorn in Arthur for the early Archimedes, but as a long time RISC OS user, I can tell that people calling it a taskbar are basing that on screenshots, not use.
(Comparison: "Windows 2 had a taskbar, it is the green strip at the bottom!" No. Don't judge from screenshots. Try it for yourself. That strip is just an area of desktop that windows do not cover.)
It is not an app launcher -- you use the filesystem, like on a Mac. It is not an app switcher. You use the icons in the icon bar to manage program state (like the App Name menu in OS X) and to open new windows.
It *doesn't* contain an app launcher menu. It does not have a notification area. It does not have buttons for windows.
But... It *does* contain drive icons, which Windows' Taskbar doesn't. It does contain folders, which Windows doesn't. It does have a global OS status icon, which Windows doesn't. It does have a clock but it's optional.
NeXT seems to have taken the idea from Acorn Arthur and invented the dock as an OS UI feature. (Apps already had toolbars, back to later Xerox products.)
The NeXT dock is closer to the Windows taskbar... but not very. It doesn't contain drives and most of the Acorn stuff. It does have a clock but it does not convey status info. It is an app launcher but only one-by-one (like Win98/XP's "quick launch toolbar" which is a separate thing, not a standard part of the taskbar). The Dock has no hierarchical launchers or anything. The Dock is also not a window switcher -- there's a separate area at bottom left where window icons stack up, and they only appear when minimised, a bit like Windows 1.x/2.x.
Yes, 100%, there was inspiration there, but they are all different and work differently and nothing in NeXT is directly copied from Arthur.
Arthur influenced a very different UI element in NeXTstep, which worked differently and looks different. That influenced Win95 but again not directly.
There was nothing like the Taskbar before MS invented it. I am not a fan of MS but the UI R&D and engineering in Windows 95 was world-class stuff. Credit where it's due.