Guide to operations 

 - [s l ]  International Business Machines Corporation  c 1983 
 - 1 v. (various paging)  ill.  20 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computers--Programming.<br/>IBM Personal Computer XT--Reference books--Guides.
<br/><br/><label>LC Class. No.: </label>QA76.8.I2596  / C48 1984 
<br/><br/><label>Dewey Class. No.: </label>REF 004.1 GUI 1983