Uppercase

Alternatively referred to as caps and capital, uppercase (UC) is a typeface of larger characters. For example, a, b, and c is lowercase and A, B, and C is uppercase. Pressing the caps lock key will change between upper and lowercase characters or pressing the shift key while pressing a letter will make that letter capitalized.

Tip It is bad etiquette to have everything you type in ALL UPPERCASE CHARACTERS. When reading anything that is typed in all caps most readers will assume that you're yelling or just find it difficult to read.

Also see: Caps lock, Case, Case sensitive, Character, Font, Lowercase