Unix originated as a stripped down version of MULTICS created by Ken Thompson on a PDP-7 minicomputer in the 1970s. It was written in assembly language initially but later rewritten in C by Thompson and Dennis Ritchie. POSIX standards were developed to ensure portability across Unix systems. Windows started as the command-line MS-DOS operating system in the 1980s and later added a graphical user interface called Windows. It has continued adding features and versions over time to become the dominant desktop operating system, including Windows 95, 98, 2000, and NT. In conclusion, the document compares that Unix is free and open source while Windows is proprietary, Unix can run on more system varieties, and Unix has a

1. ANALYSIS OF UNIX AND
WINDOWS
“UNIX”
• It is the dominant operating system on high-end workstation
and server.
• It is used on system ranging from notebook computer to
supercomputer.
• Many important design principles are illustrated by unix.

2. 1.HISTORY OF UNIX
• Bell Labs researcher , Ken Thompson decided to write a stripped
down MULTICS by himself on discarded PDP-7 minicomputer.
• Other researcher Brian Kernighan jokingly called it UNICS,then it later
change into UNIX.
• Thompson write UNIX in high level language of his own design called
B.
• Due to weakness in B ,Ritchie design a successor B.
• Thompson and Ritchie wrote UNIX in C.
• The first portable version of UNIX 6 is replaced by version 7

3. • Steve Johnson of Bell labs designed and implemented the portable C
compiler.
• POSIX is developed .POS refer to portable operating system & IX was
added to make name UNIXish.
• POSIX commitiee produced a standerd known as 1003.1.
• Large number of additional features such as windows
system(XII),graphical user interace
• MINIX was of the first UNIX like system based on microkernel design.
• Microkernel is provide minimal functionality in kernel to make it
reliable and efficient.

4. “WINDOWS”
• The PC came equipped with a 10-bit real mode, single user , command line
oriented oper ating system called MS-DOS 1.0.
• In1983, much powerful24 KB operating system MS-DOS 2.0 relased.
• Over year MS-DOS continued to aquire new features 36 KB Microsoft MS-
DOS 3.0 comes on PC.
• Microsoft decided to give MS-DOS a graphical user interface that is called
WINDOWS.
• In 1985 WINDOWS 1.0 is released.
• In 1987 WINDOWS 2.0 is released but not much better ,finally WINDOWS
3.0 for 386 is released in1990.
• In 1995 releasing the WINDOWS 95.
• In 1998 in june with the release of WINDOWS 98 running 16-bit code.

5. • Second case windows 98 process had four GB virtual address space
• New features included better way to catalog and share image music
movies, for home networking and multiuser games.
• To produce brand new 32 windows compatible OS. This new system
called windows nt.
• Project succeeded and first version called windows NT3.1 in 1993.
• NT was designed to be protable.
• NT 4.0 was originally going to be called NT5.0 in 1999.
• Microsoft changed the to windows 2000.
• Exrta features plug and play device the USB bus and power
management.

6. • The system is installed the product key is recorded in an internal
database .
• Microsoft windows 2000 has also developed server tool kit for
advanced user.

7. CONCLUSION
• Unix is free but windows is not
• Open source development but windows is developed by Microsoft
• Unix can be installed in wide variety of computer
• Unix is more secure
• Problem is solved fast