Curtin, Dennis P.,   1941- <br/><br/>
DOS 4 :  a complete course /  [Books]. 
Dennis P. Curtin.  
 - Englewood Cliffs, N.J. :   Prentice Hall,   1990. 
 - xiii, 353 p. :   ill. ;   26 cm. 
 - Computer applications software series .
<br/><br/><label>ISBN: </label>0132190648 
<br/><br/><label>Subjects--Personal Names: </label><br/>DOS 4 (Computer operating system).
<br/><br/><label>Subjects--Uniform Titles: </label><br/>DOS 4.0.