Quick side-tangent:

Atari had a very amusing model naming scheme back in those original home computer days. The 400 and 800 were computer models, but their peripherals took other numbers in the 8## range

The #Atari410 was a cassette drive.
(What we had first.) The #Atari810 was a floppy drive. (What we would get two of later for #DontCopyThatFloppy purposes) The #Atari825 was a dot-matrix printer. The #Atari830 was their direct acoustic modem. The #Atari850 was a weird interface module...

Amusing to check out

https://atariprojects.org/2019/04/20/purchase-an-atari-850-interface-module/
https://lunduke.substack.com/p/atari-coin-executive-the-1982-answer

I am not sure I've seen a similar model/naming scheme otherwise? Usually the "device types" are split into their own naming/numbering iteration.

...

ANYway...