This document discusses different types of system software. It defines system software as software that operates computer hardware and provides a platform for running application software. It describes operating systems, system languages including low-level languages like machine language and assembly language and high-level languages. It also discusses translators like compilers and interpreters, loaders, linkers, and system utility software which help analyze, configure, optimize and maintain the computer.

1. SYSTEM SOFTWARE

2. CONTENTS
 INTRODUCTION
 DIAGRAMMATIC REPRESENTATION
 OPERATING SYSTEM
 SYSTEM LANGUAGES
 TRANSLATORS
 LOADERS
 LINKERS
 SYSTEM UTILITY SOFTWARE
 REFERENCES

3. INTRODUCTION
 What is system software?
System software is computer software designed to
operate the computer hardware and to provide and
maintain a platform for running application
software.
Examples: For OS – DOS,Windows,UNIX.
Loader, Linker.
System Utility Software

4. DIAGRAMMATIC RERESENTATION

5. OPERATING SYSTEM
 OS is consisting of set of integrated system
programs & processing programs, which supervise
the processing operations & consisting of
input/output functions of the computer systems.
 Components of OS :
- Process management.
- Memory management.
- I/O management.
- File management.
 Ex: DOS,WINDOWS,UNIX.

6. SYSTEM LANGUAGES
LOW LEVEL LANGUAGES
They are machine oriented
& machine dependent
language, where each
instruction corresponds to a
machine instruction.
Category:
1. Machine language.
2. Assembly language.
Concept of Assembler?
HIGH LEVEL LANGUAGES
They are machine oriented &
machine independent which
require the use of translators
& are self documenting.
Ex. BASIC,PASCAL,COBOL.

7. TRANSLATORS
 They are also called as language processors. They
are of two types of HLL processors:
- Compilers.
Ex. COBOL ( Translation of entire program)
- Interpreter.
Ex. BASIC (Translating the program line by
line)

8. LOADER
The function of loader is loading, linking & reallocation.
- Loading the specified program into main memory.
- Storage allocation to a load program.
- Making program to execute properly.
- Linking of programs with each other.
Types:
1. Relocating Loader. (Pointers are absolute address
rather than base address)
2. Dynamic linking loader.( It load & link shared
libraries (like .dll files) to the already loaded running
program

9. LINKER
 They help in merging the
individual program module
so that they can integrate
with each other.
 They are mainly used in
HLL to build the linkage of
built in function such as
mathematical functions
sqrt,sqr,sin,cos etc.

10. SYSTEM UTILITY SOFTWARE
Utility software is a kind of system
software designed to help analyze, configure,
optimize and maintain the computer. Utility software
usually focuses on how the computer infrastructure
(including the computer hardware, operating
system, application software and data storage )
operates.
UTILITY SOFTWARE CATEGORIES:
Disk storage, disk defragmenters, disk cleaners, disk
partitions, backup , disk compression, file managers
etc.

11. REFERENCES
 Uppin,C.V, Ravi Naik,2005. “Basics of IT”, Manipal
Universal Learning Pvt. Ltd., Manipal, pg 91-100.
 Websites Referred:
GOOGLE : www.google.com
BING : www.bing.com
Wikipedia : www.wikipedia.com

12. Q & A