Examples of different case textText or inputted text that is capitalization sensitive. For example, "Computer" and "computer" are two different words because the "C" is in uppercase and lowercase. Many times a password and username is case-sensitive which means your username or password must have the proper case if you want to login. If you are unable to log into a computer or service make sure your caps lock key is not on and that you are using the correct case.

Anything that is not case sensitive means that any uppercase or lowercase character can be entered. For example, the Windows command line or MS-DOS is not case-sensitive, however, the Linux command line is case sensitive. In other words you could type "cd", "CD", "Cd", or "cD" for the cd command in the Windows command line without error, but only "ls" will work for the ls command in Linux, typing in "LS" would generate an error.

Related pages

Also see: Case, Keyboard terms, Lowercase, Uppercase