1. System Programming
By Prof.Naveed Zishan

2. System Programming
System programs are those programs which are used to execute users program.
System software
System software consists of a variety of programs that support the operation of a computer (ex: text editor, compiler, debugger)
One characteristic in which most system software differ from application software is machine dependency
A system software programmer must know the target machine structure

3. System Software Concept
Users
Application Program
Debugger
Macro Processor
Text Editor
Utility Program (Library)
Complier
Assembler
Load and Linker OS
Memory Management
Process Management
Device Management
Information Management
Bare Machine (Computer)

4. System Software The system software includes Assembler Linker Loader
Macro processor
Text editor
Compiler
Operating system
Debugging system
Source Code Control System
(optional) Database Management System

5. Assembler
Assembler: It takes assembly language program and converts to Low level language program
Low Level Language
Assembly language Program
Assembler

6. Loader
Loader :It takes the output of assembler ie. low level language program and prepares it for execution
Loader
Prepares LLL for Execution
Low Level Language(LLL)

7. Compiler
Compiler is a System Program ,it takes High Language program Converts it into low level language program
Low Level Language(LLL) program
High Level Language(LLL) program
Compiler

8. Operating System
Operating System is an interface between user and hardware.
An operating system (OS) is system software that manages computer hardware and software resources and provides common services for computer programs.

9. Operating System