If there is a difference between whether a word or letter needs to be entered in upper case (ABC) or lower case (abc) the system is said to be case sensitive. Usernames and passwords are often case sensitive, so it important you remember this information exactly.
HFS file names can be saved in uppercase or lowercase letters. The file named ./FILE1 does not refer to the same file as ./file1 or ./File1.
A characteristic of computer software that considers the case of alphabetic characters to be significant. For example, a case sensitive search engine would not retrieve the character string "Encoding" if the search was entered as "encoding". In XML, tags are case-sensitive, and so all EAD tag names must be entered in lower case.
the ability of a search tool to distiguish between upper and lowercase letters. Some search tools are not case sensitive and will simply read all letters as lowercase. Others may distiguish between the word "aids" and the disease "AIDS," or the word "baker" and the name "Baker."
The ability of a search tool to distinguish between uppercase and lowercase letters. Some search tools aren't case sensitive; no matter what you type, the tool picks up only lowercase matches. Search engines that are case sensitive strictly follow a search request; they'll return documents containing the words in the case in which they were entered in the search expression.
Capitalization matters in a search that is case sensitive. Capital letters (upper case) retrieve only upper case. Most search tools are not case sensitive or only respond to initial capitals, as in proper names. Using all lower case (no capitals), is usually advised, because lower case will always retrieve upper case as well.
some operating systems make a distinction between upper and lower case letters, even in file names. This is the case with most Web servers, so you must be sure always to use the correct case for letters in a Web URL.
Many Internet addresses are case sensitive.
Values in Network Registrar are not case sensitive, with the exception of passwords.
The ability of a search engine to distinguish between upper and lower case letters. Some search engines aren't case sensitive; no matter what you type the search engine picks up lower case matches only. Search engines that are case sensitive will strictly follow the search request and return documents that contain the words in the case in which they were typed in the search expression.
Text sometimes exhibits case sensitivity, that is, words can differ in meaning based on the differing use of uppercase and lowercase letters. Words with capital letters don't always have the same meaning as words with lowercase letters. For example, Bill is the name of former president (Clinton) who signs a bill (which is a proposed law put before a legislature).
