A
n Operating System (OS) is a
collection of system
programs that together
control the operation of
computer system.
Every General purpose computer must
have an operating system to run other
programs
Operating system used in PCs
Operating Systems
A. MS Dos
B. Unix/ Linux

Windows 3.1

Windows 95

Windows 98

Windows NT
C. Mac OS
D. Windows
Mrs.NayaniFernando
Principal
Kalutara High School
Kalutara
Workshop for School HARDWARE MAINTENANCE UNIT
We are pleased to inform you that we have organized a workshop for the School
Hardware Unit in your school on the 15th July 2013 at 9.30 am at the Computer Study
Center, Colombo 05
Please be kind enough to participate in above workshop
 Center Manager
Computer Study Center
15, Main Street
Colombo
 0112768425
 cscstudt@gmail.com
Thank you
………………………………..
Center Manager