Operating Systems

What is?

Is a software, which makes a computer to actually work. Enables all the programs we use, organizes and cotrols the hardware. Acts as an interface between the application programs and the machine hardware

What does a Operating System do?:

Controlling and allocating memory

Prioritizing system request

Controlling input and output devices

Facilitatin networking and managing file systems

Types of Operating Systems

Single User Systems

Multi User Systems

Provides a platform for only one user at a time.

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Provides regulated access for a number of users by maintaining

a database of known users.

Refers to computer systems that support two or more simultaneous users.

Another term for multi-user is time sharing

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systems where no user accounts are required.

operating system which run on standalone

They are popularly associated with Desktop

Main Functions

1 Program creation

2 Program execution

3 Input/Output operations

4 Error detection

5 Resource allocation

6 Accounting

7 protection

Types:

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Windows

MAC OS

Android

Linux

Structure:

Hardware

Software

Application Programs

System Programs