OPERATING SYSTEM Intermediary between the user and hardware.

PURPOSE OF OPERATING SYSTEM

To provide an environment in which a user can execute programs within which other programs can do useful work.

PRIMARY GOALS

• to make the computer system convenient to use

• to use the computer hardware in an efficient manner

SPECIFIC FUNCTIONS OF OPERATING SYSTEM

• Job Sequencing • Job Control Language Interpretation (JCL) • Error Handling • Input/Output Handling • Interrupt Handling

SPECIFIC FUNCTIONS OF OPERATING SYSTEM

• Scheduling • Resource Control • Protection • Multi-access

Common Operating Systems

• MS-DOS • Windows 95 • Windows 98 • Windows ME (Windows Millennium Edition) • Windows NT • Windows 2000• Windows XP

Common Operating Systems

• Windows Vista • Windows CE PALM OS SYMBIAN • Apple Macintosh • Mac OS X • OS/2 • UNIX • Linux

•Non-graphical line-oriented

•command-driven operating system.

•Not user Friendly interface

Developed by Bell Labs to handle complex scientific applications.

A popular OS for business with complex system from IBM.

Multitasking OS that was the first graphical interface to achieve

commercial success.

The tenth major version of Apple’s operating system for

Macintosh computers.

It was released in early 2007 with higher requirement for memory and processor

An update of Windows 98

An upgrade to Windows 2000

Unix-like Operating System

An OS developed primarily for client-type networks