This document presents information about the UNIX operating system from a group consisting of 5 members. It provides a brief history of UNIX, noting it was developed in the 1970s at Bell Labs and was intended as a programmer's workbench. The document outlines some key advantages of UNIX, including its portability, multi-tasking abilities, and security features. It also mentions some disadvantages such as its less user-friendly command line interface. In conclusion, it notes UNIX now runs on almost every type of computer.

1. OPERATING SYSTEM
Presented by: Group(4)
UNIX

2. TEAM MEMBERS
 1. 3CS-15 Maung Yair Pyae Kyaw LEADER
 2. 3CS-7 Ma Khin Soe Win
 3. 3CS-13 Nang Kyein Kham Naunt
 4. 3CS-17 Ma Thiri Htun
 5. 3CS-22 Ma Hnin Yu Yu Htun

3. OBJECTIVES
o To know the history of UNIX Operating System.
o To know the weakness of UNIX Operating System.
o To know the advantages over other Operating Systems.

4. INTRODUCTION
UNIX is a kind of multi-tasking,
multi-user computer Operating
System that derive from the AT&T
Unix, developed in the 1970s at the
Bell Labs research center by Ken
Thompson, Dennis Ritchie, Brian
Kernighan and Joe Ossanna.

5. Originally, UNIX was meant to be a
programmer’s workbench to be used for developing
software to be run on multiple platforms more than
to be used to run application software.
The system grew larger as the operating
system started spreading in the academic circle, as
user added their own tools to the system and
shared them with colleagues.
Therefore, UNIX was designed to be portable,
multi-tasking and multi-user in an time-sharing
configuration.

7. The UNIX system is composed of several
components that were originally packaged
together. By including the development
environment, libraries, documents and the
portable, modifiable source code for all of these
components, in addition to the kernel of an
operating system, UNIX was a self-contained
software system.
Components of UNIX

8. The UNIX system had significant impact on other
operating systems. It won its success by:
• Direct interaction.
• Providing the software at a nominal fee for
educational use.
• Running on inexpensive hardware.
• Being easy to adapt and move to different
machines.
UNIX VS OTHER OS

9. • Full multitasking with protected memory.
Multiple users can run multiple programs each
at the same time without interfering with each
other or crashing the system.
• UNIX is very portable, which means it can run
on a number of different hardware platforms,
making it easy for user to install on whatever
hardware they choose to use.
• Being easy to adapt and move to different
machines.(machine independent)
ADVANTAGES

10. • Very efficient virtual memory, so many
programs can run with a modest amount of
physical memory.
• Access Control and security. All user must be
authenticated by a valid account and password
to use the system at all. All files are owned by
particular accounts. The owner can decide
whether others have read or write access to
his files.

11. • Its command line shell interface is not user-
friendly.
• It has a lot of utilities(over 400 standard ones)
and their documentation is short on examples
and tutorials to figure out how to use that tools
to accomplish various kinds of tasks.
• To use UNIX well, the user needs to
understand some of the main design features.
DISADVANTAGES

12. DIFFERENT FLAVORS OF UNIX
UNIX has many implementations and flavors,
like the AT&T’s System V, Berkeley’s BSD, Santa
Cruz Operations SCO,Novell’s UnixWare, Sun’s
SunOS/Solaris, IBM’s AIX, Hewlett-Packard HP-
UX, SGI’s IRIX, Compaq(DEC)’s Digital UNIX,
Apple’s Mac OS X and Linus Torvald’s Linux.
They all follow the UNIX standards POSIX
(Portable Operating System Interface).

13. CONCLUSION
Today UNIX runs on almost every type of
computers, from the supercomputers to personal
computers.

14. ANY QUESTIONS?

15. THANK YOU
FOR YOUR PRECIOUS
TIME!