Radio Shack TRS-80 model III Owner's Manual page 32

TRSDOS
System,
Program, and Data
Files
System
files
include the
trsdos
operating
system
software, the
basic language
interpreter, the
format,
backup
and
convert
utilities,
and other software
which
is
released
by Radio
Shack.
These
files
appear
in the
Directory with an
"S"
attribute.
(See dir)
Program
files
are stored
in
a special
format which
allows
them
to
be loaded and
executed
directly
from
the
trsdos ready
level.
For example,
the
basic
interpreter
is
a
program
file.
Data
files
include
all files
that are
not
in
the correct
format
to
allow loading
and
executing
from trsdos ready. For example,
a
program
written
in
basic
will
be
stored as a data
file.
It
can be loaded and executed from
basic, but not
from
TRSDOS READY.
Master Passwords
Each
diskette
is
initially
assigned
a
master
password
during
format
or
backup.
(Your master
password
for
trsdos
is
password.) The
master
password
allows
you
to
use
backup, purge, and prot on
a diskette.
Using
a
diskette's
master
password,
you
may
change
it
(see
prot).
25