OS
Definition: OS is a middleman between user and hardware.
FUNCTION : Operating System controls and coordinates usage of hardware among various applications and users
OS is also a resource allocator
function : Manage all resources
OS is also a control program
function : controls execution of program to prevent errors and improper use of computer
Basic function:
Permit file operation
interface between
user
hardware
create
delete
edit
rename
provide security
password
user accounts
start the computer operation when its on
Manage
memory
processor time
schedule programs
Accounting resources usage
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product of OS
Closed source OS
Open source OS
users dont have to pay because its free
Users must PAY because it has copyright
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