Juniper Systems Allegro DOS Manual - Manual (Page 213)

Technical Reference Page 6-7
Glossary of DOS Terms
Following is a glossary of some basic terms relating to the operating
systems, memory, and data storage options.
AUTOEXEC.BAT File
An AUTOEXEC.BAT startup file contains default configuration
information. There is an AUTOEXEC.BAT file on both the Allegro's C:
and A: drive. The Allegro usually boots from the C: drive.
Therefore, the AUTOEXEC.BAT on the C: drive is activated first. It does
not chain to A:. You can modify this file as needed for your application.
Byte
A byte is the amount of space it takes to store one character.
CONFIG.SYS File
A CONFIG.SYS startup file contains default information that configures
the hardware components on a computer. There is a
CONFIG.SYS file on both the Allegro's C: and A: drive. Because the
Allegro boots from the C: drive on default, the commands in the
CONFIG.SYS located on the C: drive are activated. You cannot chain to
other CONFIG.SYS files using MS-DOS. You can modify the
CONFIG.SYS file on drive C: if required.
Disks and Disk Drives
Computer disks can be classified into two basic groups: Diskettes and
hard drives (also called fixed drives). The Allegro uses a solid state hard
disk and PC card for program and data storage. The solid state disk is
non-volatile.
DOS
DOS is an acronym for Disk Operating System. DOS consists of a set of
commands or code which tells the computer how to process
information. DOS runs programs, manages files, controls information
processing, directs input and output, and performs many other related
functions.
File
A file is a defined set of related information electronically stored on
your Allegro or PC. Examples: a letter, a database, or a program.
Computer files are stored either in the computer’s internal memory
(RAM and ROM) or on storage media, typically disks (diskettes and
hard drives).