running more than one application in memory at the same time

A program, such as a spell checker or calendar, that remains loaded in memory so that it may be quickly recalled while another program is running, as found in operating systems which do not allow multitasking.

to make easier; to assist

to get into someone's computer system without permission in order to get information or do something illegal

A single level in the stacking order that can hold any number of objects

to take as one's own

a promise or pledge to do something

to set up (an organization, system, or set of rules) on a firm or permanent basis.

Exit a login shell

A software program you can use to find Web sites, Web pages, and Internet files.

Interface between user and computer in which the user enters commands to communicate with the computer system.

the central or most important part of something.

the part of a picture, scene, or design that forms a setting for the main figures or objects, or appears furthest from the viewer.