An interesting and a little bit funny infographic about caps lock designed by Knocktwice
Caps lock is a lock key found on many computer keyboards, depending on the local keyboard layout they implement. It is located in the position of a similar Shift lock key (and sometimes a Ctrl key) found in some other keyboard layouts.
The idea of caps lock being considered rude or shouting originates in the early Usenet of the Internet, where most conversation was text-only on message boards.