What are the components of an operating system?

There are three main components:
1.control programs
2.sytem service programs
3.utility programs




CONTROL PROGRAMS
A. Control Programs
control & maintain the operation of computer
1. Initial program loader (IPL)
Program in the form of firmware (software stored in ROM)
Computer ON, then electronic chip is automatically activated & IPL read the boot sector routine (BSR), reside in the primary memory
B. System Service Program
Support control programs
Divided into three portions
Linkage Editor
Librarian
Input/Output control system
C. Utility Programs
e.g. MS-DOS : Fdisk, FORMAT, ATTRIB, BACKUP, FIND