Programmable controllers explained. 

 - New York  Audio Visual Source  1991. 
 - 3 video cassettes (883.1: 16min. 05s.; 833.2: 18min. 45s.; 833.3: 15min. 55s)  sd., col.  1/2in 
<br/><br/> PAL 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Programmable controllers
<br/><br/><label>Dewey Class. No.: </label>629.89 PRO 1991