One of the IBM 1401 computers (1959) at the Computer History Museum has hardware support for pre-decimal pounds/shillings/pence, to perform arithmetic on these

One of the IBM 1401 computers (1959) at the Computer History Museum has hardware support for pre-decimal pounds/shillings/pence, to perform arithmetic on these values and print them. Thus, the computer has three fundamental datatypes in hardware: arbitrary-length strings, arbitrary-length integers, and pounds/shillings/pence. Of course there were two competing standards for encoding pounds/shillings/pence, so the front panel has a knob to select the standard. (Before decimalization, there were 12 pence in a shilling and 20 shillings in a pound. Mathematical operations on currency were both difficult and extremely common, so IBM provided hardware support as an option. There were boards of transistors so you could add, subtract, multiply, or divide currency values with a single operation, rather than an inconvenient sequence of instructions.) Photos in my Twitter thread: https://twitter.com/kenshirriff/status/1364365985499602947 https://twitter.com/kenshirriff/status/1364365985499602947 To get back to the original topic, I'll mention that my MacBook Air would drop keystrokes if I visited a website with, say, a video ad. I find it kind of appalling that computers in the 1960s could handle input from hundreds of keyboards at once, while a 2017 computer can't manage a single keyboard.