Data sources :  the comprehensive guide to the information processing industry : equipment, software, services, companies, and people. 
 Datasources  Hardware & data communications  Software 

 - New York, N.Y. :  Ziff-Davis Pub. Co., 
 - v. :  il. ;  28 cm. 
 - Quarterly 
 - Vol. 1, no. 1 (autumn 1981)- 
<br/><br/>Summer 1983-   issued in two vols.: Hardware-data communications; and: Software; <1987>-1991 in three vols.: Hardware-data communications; Software; and: Data comm/telecomm; 1992- in two vols: Hardware & data communications; Software <Vol. 5, no. 4-> called also <2nd quarter 1986-> 
<br/><br/><label>ISSN: </label>0744-1673 
<br/><br/><label>LCCN: </label>82645165 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer industry--Directories--United States<br/>Computadoras--Industria y comercio--Estados Unidos--Directorios.
<br/><br/><label>LC Class. No.: </label>HD9696.C63  / U51592