Columbia subject headings:
CD-ROMs--Periodicals.
Information storage and retrieval systems--Periodicals.
Online data processing--Periodicals.
Harvard subject headings:
CD-ROMs--Periodicals.
Information storage and retrieval systems--Periodicals
Online data processing--Periodicals.
Princeton subject headings:
CD-ROMs--Periodicals.
Information storage and retrieval systems--Periodicals.
Online data processing--Periodicals.
Periodicals.