“2001” laptop: What *are* these?

There are several raised rectangular “buttons” on the briefcase computer prop that appear to be simple beveled rectangles of plexiglass, or cast clear plastic. I’m reasonably certain that I’ve seen these on “instrument panel” props before, typically lighted from behind. I don’t know if they are simple bits of plastic or if they were originally push buttons. Here it looks as if they were simply glued on and unlit, but lighting them from behind would seem appropriate.

They can be recreated via CAD and 3D printing easily enough… probably easier still to simply *make* one by hand. But it’d be good to know exactly what they are.

They *kinda* look like the indicator lights on Goldfingers “trick pool table” control panel. Most of these look like simple plexiglas rectangles, but some look like the “laptop” buttons turned upside-down. Shrug.