Disk operating system :  getting started-upgrade. 

 - verison 5.00 
 - Boca Raton, Fla. :  International Business Machines,  1992. 
 - vi, 65p. :  illus. ;  21.5cm. 
 - Personal computer, computer language series .
<br/><br/> Includes appendix, trademarks and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Operating systems (Computers).
<br/><br/><label>LC Class. No.: </label>QA 76.76 O63  / D631 1992