APPLICATION AND ANALYSIS OF DATABASES IN THREE UNITS WITH CNPAC NETWORK
三家数据库与CNPAC网的使用和分析

The paper explains in detail the quality and cost of the Packet Switched Public Data Network (PSPDN) by on line searching of the databases in the network of three information units in Beijing and a conclusion is thus drawn by the authors that PSPDN is superior to the telephone network in both communication quality and communication cost. The paper also give some comments on the databases in the networking of the above three units from the view of the user.