The STOP and RESET buttons are from a Documation card reader.[1] They're not guarded. They just come from a standard kit of buttons and lamps where you could assemble the components and dividers into a control panel. That style of illuminated push button was once popular and is still available.[2] NASA Mission Control consoles had lots of them.
The hover images were delightful thank you for that little bit of whimsy. Also the iTunes Burn CD one was my favorite! I totally forgot about that and its so fun compared to flat design.
I fully expected the origin of "Molly Guard" to be apocryphal, akin to something your boomer uncle sends you in 2008, that's been forwarded 1000 times and you can see all the fwd: address lists in the message ("Hey Susan, thought you might find this funny... -Bill"). I was not expecting to see the actual Molly in an archived newspaper article. Pretty cool.
[1] https://www.youtube.com/watch?v=se0F1bLfFKY
[2] https://cpc.farnell.com/rjs-electronics/rjs-k16-391-ge-65j/i...
Creators of some keyboards placing a sleep button right above arrow keys didn't bother doing this.