usage
The way in which statements in a command or programming language are actually used. In geoprocessing, usage for a tool […]
GIS Dictionary
usage time
[Internet] The amount of time between when a client gets a reference to a service and when they release it.
user interface
[software] The aspects of a computer system or program with which a software user can interact, and the commands and
user name
[programming] The identification used for authentication when a user logs in to a program.