User’s Guide
Note:
This write-protection feature does not pre-
vent the information on the diskette from being lost
from exposure to a magnetic field or a bulk disk-
ette eraser.
HOW
MS-DOS
STORES INFORMATION
If
you want to learn more about how your operat-
ing system works, you need to know how
MS-DOS
organizes and stores information.
About Files
Your computer stores all information on the disk-
ette in files.
A
file is a collection
of
information.
These are the main types of files:
System files
contain operating system informa-
tion that manages the computer’s operations.
Program files
contain information that causes
the computer to perform a task or set of tasks.
Data
files
contain information you enter, such as
the documents and spreadsheets you create
with software.
About Directories
All
files on a diskette reside in directories.
A
direc-
tory is simply a storage space for your files. When
you format a diskette, you create one directory
called the root directory. On your
MS-DOS
system
disk, the root directory contains all command and
system files. When you start up your computer
using
MS-DOS,
you are automatically in (operating
from) the root directory.
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