[AnotherGoodName]

For the keyboard/mouse now being small computers that's been true since the 1970s. Almost all keyboards for a period of about 30 years had an 8048 or 8051 CPU. It's how they serialized the keystrokes. From the model M keyboard through to everything up till the USB era.

[kevin_thibedeau]

In the 70s it would be more common to have an MSI part that ran matrix scanning and spit out parallel bus ASCII. UCs were still spendy.