DOS stands for Disk Operating System. It is a smaller amount probably employed in the current state of affairs whereas windows may be a wide used in operation system. It consumes less memory and power than windows.

Window has no full form but it is widely used operating system than DOS operating system. It consumes more memory and power than DOS operating system.

First you should know that windows operating system is a paid OS whereas the DOS and Linux are the free operating systems. In some laptops there are windows pre-installed. So the windows laptops having more price. But if there is a DOS or Linux operating systems inside the laptops then their price obviously lower. The windows operating system has some specifications like there are some icons inside the laptop screen, all the Microsoft features like home, excel, power point are available in the laptop. But if you consider about DOS (Disk Operating System) there are no such features of Microsoft and there are no icons inside the laptop screen. To do all tasks in a DOS laptop you have to enter the codes. But now-a-days no one prefer this OS. It is only pre-installed to boot your laptop.

Some Differences between DOS VS Windows:

DOS is single tasking operating system.	While windows are multitasking operating systems.
2.	It consumes low power.	While windows consume high power.
3.	It consumes less memory in comparison of windows.	While it consumes more memory.
4.	DOS does not support networking.	While window supports networking.
5.	DOS is complex in terms of using.	Whereas it is simple for using.
6.	DOS does not share time.	While window can share time.
7.	DOS is a command line operating system.	Whereas windows are the graphical operating systems.
8.	DOS operating system is less preferred than windows.	While windows are more preferred by the users in comparison of DOS.
9.	In DOS operating system multimedia is not supported such as: Games, movies,songs etc.	While windows support multimedia such as: Games, movies,songs etc.
10.	In DOS operation systems, operation are performed speedily than windows OS.	While in windows OS, operation are performed slowly than DOS OS.
11.	There is only one window opened at a time in DOS.	While in windows, multiple windows can be opened at a time.

Then know about the Linux. It is similar to the windows operating system but windows is paid and it is free. It is an open source OS. You can get all the features of windows OS in a Linux operating system. But there are some other versions of Microsoft office, excel than the normal versions of Microsoft office, excel that you use in a normal windows OS. But you can almost do every work in a Linux OS that you do in a normal windows OS.

Which One Should Buy??

As you knew that the windows pre-installed laptops have more price with compare to DOS and Linux. So you should always buy the DOS or Linux installed laptops and later install the windows OS for free. Because the DOS and Linux installed laptops are available in a lower price and you can install the windows OS later by paying small amount of money or by free.

But wait if you are deciding to install Windows OS later then don’t install the pirated versions of Windows because in future it may be harm to your laptop. So if you want to install Windows OS later for free then join the Windows Insider Program from which you can install the latest windows OS with all the Microsoft features.

UNIX and DOS commands:

Back in the days before Microsoft Windows dominated the PC market, operating system were controlled by commands. PC users were required to learn these commands in order to perform tasks. During the 1980s, Microsoft DOS dominated the PC market while the early UNIX command systems were used on larger multi-processing servers. The main difference between UNIX and DOS is that DOS was originally designed for single-user systems, while UNIX was designed for systems with many users.

While PC’s have evolved into GUI interfaces such as Windows, UNIX systems have never evolved into GUI environments. Hence, The Oracle professional must master a bewildering number of cryptic UNIX commands in order to manage their Oracle databases.

One of the most confounding issues for the UNIX neophyte is being confronted with a complex UNIX command. The cryptic nature of UNIX is such that even the most seasoned UNIX professional may have trouble deciphering the purpose of the command.

We will begin by examining a cryptic UNIX command and then see how the command is deciphered by applying a simple set of rules.

Because UNIX and MS-DOS were developed at the same time they share some common syntax, and the UNIX neophyte will be happy to find many common commands and concepts.

Below is a simple table showing some common UNIX commands and their Windows counterparts.

UNIX	MS-DOS	Command Function
—	cd –	Switch between current and last directory
cat	Type	Displays the contents of a file
cd	Cd	Moves from one directory to another
cd /u01/test	cd c:\u01\test	Change directory paths
cd ..	cd..	Go up in directory
chmod	Attrib	Sets file permissions
clear	Cls	Clear the screen
cp	copy	Copies a file (or a group of files)
diff	fc	Compare two files
cpio	xcopy	Backs up and recovers files
date	date	Display the system date
doskey	<ctl> k (3)	Display command history
export PS1=?xx?	prompt	Change the command prompt text
find	grep	Find a character string in a file
gzip	dblspace	Compress a data file
ln	—	Forms a link to a file
lp	print	Queues a file for printing
lpstat	print	Displays the printing queue
ls -al	dir	Displays the contents of a directory
mem	lsdev (2)	Display RAM memory
mkdir	md	Creates a new subdirectory
move	cp  (4)	Move a file to another directory
mv	rename	Renames a file
rm	del	Deletes a file (or group of files)
rmdir	rd	Deletes an existing directory
setenv  (1)	set	Set an environment variable
sort	sort	Sorts lines in a file
ver	uname -a	Display OS version
Vi	edit	Creates and edits text

Hope This Helps!

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