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