Command-line arguments that begin with a hyphen are not case sensitive. For example, -LO and -Lo and -lo all mean the same thing. In this manual, group letters are shown in upper case, and the actual arguments are shown in lower case (for example, -Lo). This is done for consistency and clarity.
Other command-line arguments are case-sensitive if the host machine is case-sensitive, otherwise, they are not. For example, on UNIX machines, ccbl TEST and ccbl test are different commands because the file names TEST and test are different on UNIX systems.