The digital computer :  computer hardware devices and subsystems / 
W.S. Matheson 
 -  Unit.6 and Unit.7 
 - Walton  the Open University  1975 
 - 50 p. 
<br/><br/>Introduction (Page-9), Primitive Devices (Page-10), Communication Devices And Subsystems (Page-16), Storage Devices And Subsystems (Page-23), Processing Devices And Subsystems (Page-31), Controlling The Major Subsystems (Page-37) 
<br/><br/><label>ISBN: </label>0335027520 
<br/><br/><label>Dewey Class. No.: </label>004.16,OPE