Operating System (OS)

 1. Introduction to Operating System:

➤ Set or collection of software program that control/  manage the overall operation of computer system.

➤ OS is software that manages the computer hardware.

➤ coordinate /manage control/ supervisor the computer software and hardware.

Component of OS:

1. Shell (coordinate)

2. Core (kernel) (process)

3. System library

4. System utility

Feature of OS:

➤ Process management

➤ Security

➤ error detection

➤ Command interpretation

➤ provide platform for application

➤ Provide user interface

➤ file management

➤ program management

➤ disk management

➤ resource management

➤ Job scheduling

➤ resolve conflict file

➤ configure hardware

Types of Operating System:

Based on Interface:

1. GUI (Graphical User Interface):

➤ It interact with computer by select any graphical object (folder, file, picture, dialog box.

➤ see/look the graphic, most popular OS.

➤ We use procedure /process E.g. Windows, Linux, Android.

2. CUI (Command User Interface):

➤ It is oldest OS.

➤ User interact with computer by typing command.

➤ It is non-graphical OS.

➤ Not user friendly. E.g. MS DOS, Unix, CP/M

Based on User:

1. Single user OS:

➤ It supports only one user/ individual user at a time.

➤ In one time one user can access the system

➤ E.g. DOS, android

2. Multi user OS:

➤ It supports two or more than two user simultaneously.

➤ It user network (work group)

➤ Most use in mainframe, super computer.

➤ E.g. Unix, Linux, Mac, Windows, NT 2000, XP,, Vista, 7, 8, 10.