Operating System

1. Performs

1.1. Users

1.1.1. Log on

1.1.2. Log off

1.2. Storage

1.2.1. Format

1.2.2. Compress

1.3. Device

1.3.1. Install

1.3.2. Upgrade

1.4. Applications

1.4.1. Launch

1.4.2. Terminate

2. Components

2.1. Hardware

2.1.1. BIOS

2.1.2. Processor

2.2. Software

2.2.1. Kernel

3. Interface

3.1. Between

3.1.1. Operator

3.1.2. Computer

3.2. CLI

3.2.1. Instructions

3.2.1.1. in Windows

3.2.1.1.1. MS-DOS

3.2.1.2. in MAC

3.2.1.2.1. CLI

3.3. GUI

3.3.1. Icons

3.3.2. popular os

3.3.2.1. windows

3.3.2.2. Mac

4. Types

4.1. Personal Computer

4.1.1. Windows

4.1.2. Linux

4.1.3. Mac

4.2. Server

4.2.1. Windows

4.2.2. Linux

4.3. Mobile

4.3.1. Windows

4.3.2. Android

4.3.3. iOS

4.3.4. QNX

4.3.5. S60

5. Is

5.1. MultiTasking Software