Are there any studies which investigate the usage of Caps-Lock?

1. Is it useful to use Caps Lock?
2. Why do people type with Caps Lock on?
3. Who invented the Caps Lock button?

Is it useful to use Caps Lock?

Sure, typing in all capital letters is certainly useful for particular tasks that fewer than 1% of computer users will ever perform, and sure, Caps Lock might sometimes even be useful in a casual setting too, like SHOUTING SOMETHING IN A GROUP CHAT or writing an acronym without exhausting your pinky.

Why do people type with Caps Lock on?

Emphatic caps feel like the quintessential example of internet tone of voice. Sure enough, they've been around since the very early days online. WHEN YOU WRITE IN ALL CAPS IT SOUNDS LIKE YOU'RE SHOUTING. Using capital letters to indicate strong feeling may be the most famous example of typographical tone of voice.

Who invented the Caps Lock button?

As a person could guess, this created somewhat of a problem because some people would end up typing with symbols when they were trying to type with numbers. To solve this problem, a telephone engineer working at Bell Labs during the 1960s named Doug Kerr decided to invent the Caps-Lock key.