CD-ROM-aided Databases

(5)CD-ROM-made Telephon Directory

Abstract

Nippon Telegraph & Telephone Corporation (NTT) was the first company in the world to record the entire business classified Tokyo telephone directory containing more than 1,100,000 entries on CD-ROM. NTT's telephone directory on CD-ROM contains the business classification, the names, addresses and telephon numbers of more than 1,100,000 companies located in Tokyo’s 23 wards and surrounding towns. This report about NTT’s telephone directory on CD-ROM was written about the reason of development, outline, and the point at issue.