Columbia subject headings:
CD-ROMs.
Information technology.
Library science--Technological innovations.
Optical disks.
Optical storage devices.
Harvard subject headings:
CD-ROMs.
Information technology
Library science--Technological innovations.
Optical disks.
Optical storage devices.
Princeton subject headings:
CD-ROMs.
Information technology.
Library science--Technological innovations.
Optical disks.
Optical storage devices.