Radio Shack TRS-80 Trsdos & Disk Basic Reference Manual page 176

Appendices
user
RAM
or user
memory
See
random
access
memory.
utility
A
program
or routine which
serves a limited, specific
purpose.
There
are
two
extended
TRSDOS
utilities,
FORMAT
and
BACKUP,
and
two non-TRSDOS
utilities,
DISKDUMP/BAS
and
TAPEDISK.
'
write-protect
To
physically protect
a disk
from
being
written to
by
placing
a
tape
over the write-protect notch.
8-12