User's Manual
Roof
directory
The
main
directory
in a
hierarchical
disk
directory
structure
All
other
directories
are
subdirectories
of
the
root
directory.
RS-232C
A
standard
type
of
serial
communication.
You
can
connect
an
RS-232C
device
to
either
of
the
computer’s
RS-232C
serial
ports.
Serial
The
type
of
communication
that
transmits
data
from
a
serial
interface
to
a
serial
device
over
a
single
wire.
See
also
Interface
and
Parallel.
Shadow
RAM
The
feature
in
your
computer
that
copies
the
contents
of
the
system,
video,
and
external
BIOS
ROMs
into
the
RAM
area
of
memory
to
speed
up
processing.
SIMM
See
Memory
module.
Subdirectory
In a
hierarchical
disk
directory
structure,
a
group
of
files in a
directory
within
another
directory
or
the
root
directory.
System diskette
A
diskette
that
contains
the
operating
system
and
can
be
used
to
boot
the
computer.
14
Glossary