A case may refer to any of the following:
1. When referring to computers, a case is a term used to describe a computer chassis that holds all the parts that make a computer. See our computer chassis page for further information and related links on this term.
3. When referring to writing, case is a term used to describe the capitalization state of text characters. For example, when letters are uppercase, they're all capitals, and when they're lowercase, they have no capital letters.
How to change the case
To change the case of a letter, press and hold down the Shift key, then press the letter you want to be capitalized. Or, turn on the caps lock feature by pressing the Caps Lock key to make all letters capitalized.