os

Operating Systems: is a collection of software that manages hardware and provides common services for computer programs.

Types of Operating systems:  

Multi-tasking and Single-tasking Operating Systems    

Distributed Operating System
Embedded System
Mobile Operating System
Batch Possessive and Interactive System
Online and Offline Processing
Real-time Operating System
Multi-user and Single-user Operating System+

Windows 7: Is the second newest version of Microsoft Windows, which is am operating system for computers. Microsoft says Windows 7 is faster, more reliable and more compatible, and it is a refinement of the previous version named Windows Vista.

Windows 8: Is a version of Microsoft Windows for use on personal computers, including home and business desktop, laptops, tables, and home theater PCs. Development of Windows 8 started before the release of its predecessor, Windows  7.

iOS: Is an operating system for mobile devices, made and sold by Apple Inc. It is the default operating system of the iPhone, the iPod Touch, and the iPad.

Android: Android is an Open Handset Alliance Project.

·         OS X:  Is a series of Unix-base graphical interface systems developed, marketed, and sold by Apple Inc. It is designed to run exclusively on Mac computers, having been pre-loaded on all Macs since 2002.

·         LINUX: anoperating system kernel , by Linus Torvalds. Since the C compiler that builds Linux and the main supporting user space system tools and libraries originated in the GNU Project,