Research the ff.

BOOTING:

->  Restarting a computer or its operating system software. It is of two types  Cold booting: when the computer is started after having been switched off.  Warm booting: when the operating system alone is restarted  after a system crash or 'freeze.' Both types of booting clear out  the bugs, bombs, memory conflicts, and other idiosyncrasies of the operating system.

GUI:

-> Graphical User Interface 

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

LINUX:

-> is a Unix-like operating system that was designed to provide personal computer users a free or very low-cost operating system comparable to traditional and usually more expensive Unix systems. Linux has a reputation as a very efficient and fast-performing system.

MACINTOSH OS:

-> Mac OS is the computer operating system for Apple Computer's Macintosh line of personal computers and workstations.

MS-DOS:

-> Microsoft Disk Operating System

-> it was the most commonly used member of the DOS family of operating systems, and was the main operating system for IBM PC compatible personal computers during the 1980s to the mid 1990s, until it was gradually superseded by operating systems offering a graphical user interface (GUI), in particular by various generations of the Microsoft Windows operating system.

MULTITASKING:

-> Multitasking is the act of doing multiple things at once. It is often encouraged among office workers and students, because it is believed that multitasking is more efficient than focusing on a single task at once. Numerous studies on multitasking have been carried out, with mixed results. It would appear that in some cases, multitasking is indeed an effective way to utilize time, while in other instances, the quality of the work suffers as a result of split attention. 

NOS:

-> network operating system

-> The system software of a local area network (LAN) that integrates the network's hardware components, usually adequate for connecting up to 50 workstations. Included, typically, are such features as a menu-driven administration interface, tape backup of file-server software, security restrictions, facilities for sharing printers, central storage of application programs and databases, remote log-in via modem, and support for discuss workstations. 

OS:

->operating system

->  is software, consisting of programs and data, that runs on computers, manages computer hardware resources, and provides common services for execution of various application software  

SYSTEM SOFTWARE:

-> is computer software designed to operate the computer hardware and to provide a platform for running application software. 

APPLICATION SOFTWARE:

-> software that does specific tasks individual to other software, examples of these are
Notepad, MS Word, Internet Explorer, etc. 

UNIX

-> it is a multi-tasking mulit user based operating system.

Utility Programs

-> Programs that cleans and organizes the data in the computer.

Windows

-> it is the most Famous, Most used and it is the most efficient among other Operating Systems,
created by the Microsoft Corporation.

Windows CE

-> is an operating system developed by Microsoft for embedded systems
it is a distinct operating system and kernel, rather than a trimmed-down version of desktop Windows.

Windows Mobile

-> Portable Windows Operating System in mobile Phones and other Mobile Devices.

DIFFERENTIATE:

Mac OS 

-> t is a good Operating System because first
it doesn't have viruses unlike others and it has unique programs that is only exclusive for the operating system,
but not many uses it because of the price only high earning people and big companies us it.

WINDOWS

-> it the most commonly used Operating System, it is the first GUI integrated OS it is very easy to use
and it is not very expensive also. today the most stable Version of it is the Windows 7.

Linux 

-> although it is a free OS very few uses it, for some reasons some people does not like it. some people only use it for a substitute OS until they can buy efficient ones.