Columbia subject headings:
Computer input-output equipment--Periodicals.
Information services--Periodicals.
Libraries--Automation--Periodicals.
Library science--Data processing--Equipment and supplies--Periodicals.
Harvard subject headings:
Princeton subject headings:
Computer input-output equipment--Periodicals.
Information services--Periodicals.
Libraries--Automation--Periodicals.
Library science--Data processing--Equipment and supplies--Periodicals.
Periodicals.