OPERATING SYSTEMS KNEC NOTES

1. OPERATING SYSTEMS OVERVIEW – Click to download
2. MEMORY MANAGEMENT – Click to download
3. Mass-Storage Structure – Click to download 
4. THREADS – Click to download
5. IO Systems – Click to download

A program that acts as an intermediary between 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