In computers, case sensitivity defines whether uppercase and lowercase letters are treated as distinct (case-sensitive) or equivalent (case-insensitive). For instance, when users interested in learning about dogs search an e-book, "dog" and "Dog" are of the same significance to them.

<text> Whether a text matching operation distinguishes upper-case (capital) letters from lower case (is "case sensitive") or not ("case insensitive"). Case in file names should be preserved (for readability) but ignored when matching (so the user doesn't have to get it right). MS-DOS does not preserve case in file names, Unix preserves case and matches are case sensitive. Any decent text editor will allow the user to specify whether or not text searches should be case sensitive. Case sensitivity is also relevant in 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). Case insensitive operations are sometimes said to "fold case", from the idea of folding the character code table so that upper and lower case letters coincide. The alternative "smash case" is more likely to be used by someone who considers this behaviour a misfeature or in cases where one case is actually permanently converted to the other. "MS-DOS will automatically smash case in the names of all the files you create". (1997-07-09)

case sensitivity

case sensitivity

case sensitivity

A grammatical case is a category of nouns and noun modifiers (determiners, adjectives, participles, and numerals), which corresponds to one or more potential grammatical functions for a nominal group in a wording. In various languages, nominal groups consisting of a noun and its modifiers belong to one of a few such categories.

n. the method of studying law generally used in American law schools, in which the students read, outline (brief), discuss and hear lectures about the cases. Each case presented stands for a particular rule of law in the subject matter covered and is contained in "casebooks" on particular topics (contracts, torts, criminal law, constitutional law, agency, etc.). The system is useful since it relates the law to real and factual situations which assist students in memorization and encourages deductive reasoning. The case system is reinforced by textbooks and outlines on the subject matter, which were formerly the principal sources of learning. The method was introduced first at Harvard in 1869 by professor Christopher C. Langdell and soon became standard.