Heathkit IM-4100 Assembly Manual page 64

age 56
Ge HEATHEKIT:
TOP VIEW
DUAL 2-WIDE 2-INPUT
AND-OR-INVERT GATES
(ONE GATE EXPANDABLE) 1C15
#443-15
SN7450N
TOP VIEW
QUADRUPLE 2-INPUT
POSITIVE-NAND GATES —_1C14
#443-1 C17
SN7400N 1026