What is an Operating System, Computer System Structure, Explain Operating System
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What is an Operating System?
• A program that acts as an intermediarybetween a user of a computer and the
computer hardware.
• Operating system goals:
– Execute user programs and make solving
user problems easier.
– Make the computer system convenient to use.
• Use the computer hardware in an efficient
manner.
Computer System Structure
Computer system can be divided into four
components
Hardware – provides basic computing resources
CPU, memory, I/O devices
Operating system
Controls and coordinates use of hardware among various
applications and users
Application programs – define the ways in which the system
resources are used to solve the computing problems of the
users
Word processors, compilers, web browsers, database systems,
video games
Users
People, machines, other computers