User Friendly Book Download - Csbdu.in

U
UI (User Interface) the part of an application the user experiences as opposed to the
internal functioning of the program.
undo a command included in many word processing and graphics software applications
that allows a user to eliminate or reverse the last action. For example,
say you’ve just applied a moustache to the Mona Lisa with your new paint
program. You then decide you like the painting better the way it was originally.
With a click of the undo button or command, the moustache is gone. In many
Windows compatible programs, pressing the Ctrl and Z keys together will accomplish
the same thing as the undo feature.
undocumented features included in a program that were not described in the users
manual. Sometimes undocumented items are left out unintentionally. Sometimes
undocumented features were present to facilitate the writing of the
program by the designers and programmers and thought to be unimportant
to the end-user. Other times, such features are present as part of a test in
determining whether they will be included in future versions of the program.
UNIX a multitasking, multi-user, operating system created by Ken Thompson and
Dennis Ritchie along with a small team at Bell Laboratories in the early 1970s.
Although felt to be user un-friendly, UNIX evolved over the years and has
become popular. Because it was originally distributed in its source language
format, anyone could make modifications to the system. Today there are two
major versions of the program, System V, produced by Bell Labs and BSD4.x,
developed at Berkley University.
unpack to convert a compressed file to its original form.