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無<br>In 1979, the International Communication Bureau of R.O.C. connected some U.S. information service centers through the international telecommunication network. Since then, there are Dialog, ORBIT &amp; BRS introduced into this country. However, the users are interested in the bibliographic databases and seldomly know the non-bibliographic databases or the numeric databases. This article mainly describes the numeric database about its definition &amp; characteristics, comparison with bibliographic databases, its producers. Service systems &amp; users, data element, a brief introduction by the subject, its problem and future, Iibrary role and the present use status in the R.O.C.