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Features of DOS
It has the following important features:
It is a Single-user operating system.
he user interacts with the OS in a text mode environment.
It does not support a raphical interface so the mouse cannot be used as an input device.
asic file management functions like creating renaming copying moving deleting etc. can be easily
performed at “ ommand rompt”.
Unix
nix is first among the known operating systems that have been in use in mainframes minicomputers and
microcomputers. It has been a more popular operating system in universities big business houses etc. and
is widely used in servers workstations and mobile devices. It was originally developed in at ell
abs. Initially it was developed in assembly language but by it was recoded in which opened further
scope of development and helped in making it portable.
nix happens to be the greatest contributor in the OS community as it was the first to be developed before
indows OS or inux. he inux that we see today is the outcome of nix operating system. he nix
environment and the client server program model were essential elements in the development of internet.
nix OS is made of three ma or components: kernel standard utility program and system configuration files.
Solaris
Solaris is a nix-based operating system that was originally developed by Sun
Microsystems and was called as SunOS during . t present it is known as
Oracle Solaris after its ac uisition by Oracle in anuary .
Solaris is known for its scalability and for originating many innovative features.
Solaris supports workstations and servers that are established by Sun Microsystem and other vendors. It
helps symmetric multiprocessing where two or more identical processors are connected to a shared main
memory and the single operating system controls all the processors.
Solaris was historically developed as proprietary software. hen in une 5 Sun Microsystems released
and founded the OpenSolaris as an open source pro ect. fter the ac uisition in anuary by Oracle it
decided to discontinue the OpenSolaris distribution and its development model. In ugust the new
version Solaris was introduced as a closed source proprietary operating system.
Microsoft Windows
Microsoft indows is a widely used graphical user interface operating system for personal
computers and mobiles that provide a standard appearance on a rectangular screen. It
was first introduced in 5. In indows the user need not remember all the commands
but needs to recognise the graphical representation for the application on the screen in
order to use them. he ease in its use has made indows a very popular operating system
among the users.
indows was developed during 5. indows as of now is an outcome of many changes in its version over
the years. ifferent versions of indows since its development are:
indows . indows . Windows 95 Windows 98
Windows NT indows indows M indows
Information Technology and Communication 5

