2N691 semiconductor manufactured by United Technical Publications, listed as 2N691 (circa 1965).

2N690 semiconductor manufactured by United Technical Publications, listed as 2N690 (circa 1965).

2N1850 semiconductor manufactured by United Technical Publications, listed as 2N1850 (circa 1965).

2N1847 semiconductor manufactured by United Technical Publications, listed as 2N1847 (circa 1965).

2N1845 semiconductor manufactured by United Technical Publications, listed as 2N1845 (circa 1965).

2N1843 semiconductor manufactured by United Technical Publications, listed as 2N1843 (circa 1965).

2N1842 semiconductor manufactured by United Technical Publications, listed as 2N1842 (circa 1965).

7468 semiconductor manufactured by United Technical Publications, listed as 7468 (circa 1965).

7408 semiconductor manufactured by United Technical Publications, listed as 7408 (circa 1965).

7459 semiconductor manufactured by United Technical Publications, listed as 7459 (circa 1965).

7424 semiconductor manufactured by United Technical Publications, listed as 7424 (circa 1965).

7423 semiconductor manufactured by United Technical Publications, listed as 7423 (circa 1965).

7422 semiconductor manufactured by United Technical Publications, listed as 7422 (circa 1965).

7421 semiconductor manufactured by United Technical Publications, listed as 7421 (circa 1965).

7419 semiconductor manufactured by United Technical Publications, listed as 7419 (circa 1965).

7418 semiconductor manufactured by United Technical Publications, listed as 7418 (circa 1965).

74033N semiconductor manufactured by United Technical Publications, listed as 74033N (circa 1965).

74032N semiconductor manufactured by United Technical Publications, listed as 74032N (circa 1965).

74031N semiconductor manufactured by United Technical Publications, listed as 74031N (circa 1965).

7443 semiconductor manufactured by United Technical Publications, listed as 7443 (circa 1965).