install(ed) user base

business jargon The number units of a particular product or service that are currently in use, especially software or an Internet or computing platform. (Also referred to as "install(ed) base" or "user base.") There have been fears that the computer giant's existing installed user base may decline after their newest operating system is implemented.

Common Names:

Name	Pronounced	Usage
Mikha'il	-	Arabic
Saladin	SAL-ə-din (English), SAL-ə-deen (English)	History
Goldsmith	['gəuldsmiθ]
Azucena	ah-thoo-THE-nah (Spanish), ah-soo-SE-nah (Latin American Spanish)	Spanish
Eileen	ie-LEEN, IE-leen	Irish, English
Antiochus	-	Ancient Greek (Latinized)