Gallagher, R. E. <br/><br/>
Understanding operating systems 
Ann McIver McHoes and Ida M. Flynn 
 - Sydney  Angus and Robertson  c1966 
 - v,300p.  ill.;  23cm 
<br/><br/><label>ISBN: </label>0066071003 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Accounting.<br/>Office management.