Software Development

translation of the users need or marketing goal into a software product.

Utility Software

Any software that performs some specific task that is secondary to the main purpose of using the computer (the latter would be called application program .

User Interface

a program that controls a display for a user.

MS-DOS

a microcomputer operating system.

Unix

a multitasking computer operating system.

Multi tasking

the concurrent or interleaved execution of two or more jobs by a single CPU.

GUIs

An interface for issuing commands to a computer utilizing a pointing device, such as a mouse, that manipulates and activates graphical images on a monitor.

Operating system

the collection of software that directs a computer's operations.

Application software

a computer program designed to carry out a specialized tasks for a user.

Algorithm

a set of rules for solving a problem in a number of steps, as for finding the greatest common divisor.

Plug and Play vs. Installation

plug and play : connects its self ,it runs its self.
Installation : to install,

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