The Software users' year book  1990. 

 - [London :  VNU Business Publications,  1989. 
 - 4 v. :  ill. 
 - Annual. 
<br/><br/> Title from cover. 
<br/><br/>Volume 1. Suppliers and services.  --Volume 2. Systems software.  --Volume 3. Industry-specific software.  --Volume 4. General applications software. 
<br/><br/><label>ISBN: </label>0862711002  (set) 0862710987  (v.3) 0862710960  (v.1) 0862710979  (v.2) 0862710995  (v.4) 
<br/><br/><label>ISSN: </label>0268-6708