A 733Mhz Quicksilver Power Mac is almost as slow as a 466Mhz Digital Audio model, because there's no L3 Cache

The first note of a BBC Micro's boot chime is caused by the sound chip trying to read a bus that's in an undefined state. failure to boot causes a continuous tone

Atari Mega STE and TT keyboards use mitsumi KPQ keyswitches that use rubber tubes instead of springs or domes. when you press the key hard enough, the tube collapses under the force, giving a tactile feel.

Most Amigas are fitted with mitsumi KPR switches, which is exactly the same except instead of a rubber tube there's a coil spring, giving a linear action

both types can be fitted to the same keyboard for an extremely unnerving typing experience

Useless Computer Fun Fact: Computers Are Fun Devices! With A Computer, I Can Learn And Play With Friends And Family! :D

The SNES was probably supposed to be backwards compatible with the NES, and the functionality was ripped out early-to-mid development of the console:

1. The SNES CPU is binary-compatible with the NES CPU.
2. There is no overlap between the I/O addresses used between the SNES and NES...
3. Except for the controller port, whose bits have the same interpretation on the SNES and NES.
4. The serial controller protocol of the SNES is backward-compatible with the NES.

(I am not the first to notice this, credit to Myria, who isn't on Cohost?)