RECOGNITION SYSTEM OPERATION

Operating system is a collection of programs that act as intermediary / penjalin / connecting between users, the software with hardware computer so easy to use computer systems, computer software can efiesien used.


Why Studying the Operating System

• Is a fundamental study for the education of computer science and informatics.
• Engineer and computer scientist / informatics absolutely understand the Operating System, because the operating system is like the spirit of man.

Components of Computer Systems

1. Hardware: CPU, memory, device I / O
2. Operating system: control and manage the use of computer resources.
3. Program applications: compilers, database systems, business programs,games, etc..
4. User: human, machine and computer.

Operating System

• Can be ruled hardware, handles the allocation of resources and to protectapplications from direct connection to the hardware.
• The kernel is the "heart" of the Operating System. Parts that must always beoperated so that the operating system is always live.

Objectives and tasks of the operating system 

1. Managing all the resources contained on computer systems.
2.  Provides a set of services to users, giving users more easily and
   comfortable in using or utilizing the resources of computer systems.

All Resource Manager Computer Systems

• Physical resources: keyboard, mouse, joystick, disk drives, CD ROM, hard disk,printer,
  monitor, modem, ethernet card, multimedia equipment, etc..
• Resource abstract  (a data and program).

Based on the amount of resources managed by the Operating System ..

• It is difficult for programmers to create programs in resource-resources. 
• To simplify the programmer in order to be making the program understandable by all levels of resources, required Operating System.

Main Components of Operating Systems

1. process management
2. Memory management
3. Management Input / Output
4. File management
5. Protection system
6. Networking
7. Command interpreter system

Services provided by the operating system

1.  Program execution
2.  I/O Operation
3. File/system manipulation
4. Communications
5. Error detection
6. Resource allocation
7. Accounting
8. Protection

Position Operating Systems on the Computer Systems

1. For Laity User = Looking at computer systems as an application to solve his problems. Ordinary users can only know the command language to call or make an application program that use.
2. For view of Programmer =  To express in making an application programming language.
3. For Operating Systems Designers = Operating system in charge of making the computer hardware in order to appear beautiful, easy and convenient for programmer.

Basic Structure of Operating Systems

1. Monolithic system
   Operating system as a set of procedures where the procedure can be called byother procedures when necessary.
2. Layered system
3. Systems with virtual machines
4. Process collection system
5. Object-oriented systems
6. Client server system

Source : Sistem Operasi, Ir. Bambang Hariyanto.