1N2155 semiconductor manufactured by Allied Electronics, listed as 1N2155 (circa 1976).

1N2154 semiconductor manufactured by Allied Electronics, listed as 1N2154 (circa 1976).

1N2492 semiconductor manufactured by Allied Electronics, listed as 1N2492 (circa 1976).

1N1183 semiconductor manufactured by Allied Electronics, listed as 1N1183 (circa 1976).

1N2491 semiconductor manufactured by Allied Electronics, listed as 1N2491 (circa 1976).

1N2451 semiconductor manufactured by Allied Electronics, listed as 1N2451 (circa 1976).

1N1436 semiconductor manufactured by Allied Electronics, listed as 1N1436 (circa 1976).

1N2450R semiconductor manufactured by Allied Electronics, listed as 1N2450R (circa 1976).

1N2450 semiconductor manufactured by Allied Electronics, listed as 1N2450 (circa 1976).

7474 semiconductor manufactured by Allied Electronics, listed as 7474 (circa 1976).

7476 semiconductor manufactured by Allied Electronics, listed as 7476 (circa 1976).

7473 semiconductor manufactured by Allied Electronics, listed as 7473 (circa 1976).

7440 semiconductor manufactured by Allied Electronics, listed as 7440 (circa 1976).

7416 semiconductor manufactured by Allied Electronics, listed as 7416 (circa 1976).

7406 semiconductor manufactured by Allied Electronics, listed as 7406 (circa 1976).

7405 semiconductor manufactured by Allied Electronics, listed as 7405 (circa 1976).

7404 semiconductor manufactured by Allied Electronics, listed as 7404 (circa 1976).

7432 semiconductor manufactured by Allied Electronics, listed as 7432 (circa 1976).

7430 semiconductor manufactured by Allied Electronics, listed as 7430 (circa 1976).

7420 semiconductor manufactured by Allied Electronics, listed as 7420 (circa 1976).