3 2-Input Gates, Expandable, Open Collector, 3 clamp load resistors
<UL>
<LI><b>R111E</b> is a drawing of DEC's R111E.</LI>
<LI><b>R111F</b> is a drawing of DEC's R111F.</LI>
<LI><b>R111X</b> is a 'modernized' R111.</LI>