DOS

DOS is Disk Operating System that organizies data file, loads and executes program files and controls the input and output devices.
Booting is the first program executed when the computer is switched on.
DOS is text based.
To communicate with DOS, the screen has a prompt where you enter a command.
Case insensitive means that you can use all caps, all lowercase or a mixture of the two and it still means the same thing.
An example would be: forMAt
4 useful things to learn about DOS:
SET PATH=forces DOS to look in certain directory
? in a file name means any digit or letter
* in a file name means wildcard-any combination of digits or letters
. in a directory path stands for current directory

7 very useful DOS commands.
A: floppy drive
C: hard disk drive
DIR take you to directory
MD make new directory
CD change current directory
COPY copy files
DEL delete/erase files

DOS organizes disks by file, directory & disk drive structure.

Three requirements that must be met for a file to be named include 1-8 letter name, period & 3 letter extension.
An example: tests.com

In DOS directories named by root directory which has subdirectories, named in all caps.
An example would be A: PICTURES/SPRING/2008