<text> A property of a text matching operation which distinguishes upper-case (capital) letters from lower case.
Case sensitivity is relevant in areas including: text editors (many default to case insensitive searching but case sensitive searching is occasionally more useful); operating systems (MS-DOS filenames are case insensitive, Unix filenames are case sensitive); programming (most programming languages distiguish between case in the names of identifiers), and addressing (Internet domain names are case insensitive but RFC 822 local mailbox names are case sensitive).
(13 Jan 1996)