Lawson, Harold W. <br/><br/>
Understanding computer systems/ 
Harold W. Lawson. 
 - Rockville, Md.  Computer Science Press  1982 
 - 164 p. :   ill. ;   25 cm. 
<br/><br/><label>ISBN: </label>0914894315 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronic digital computers