NCOS1 user's programming guide :MSE16E-8 

 - 2nd ed. 
 -  Tokyo:NEC  1986 
 - 182 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Applicatin system-construction: NCOS1 operating system
<br/><br/><label>Dewey Class. No.: </label>519.68/12  / NS