7450P semiconductor manufactured by Sylvania, listed as 7450P (circa 1979).

7474P semiconductor manufactured by Sylvania, listed as 7474P (circa 1979).

748251 semiconductor manufactured by Sylvania, listed as 748251 (circa 1979).

748181 semiconductor manufactured by Sylvania, listed as 748181 (circa 1979).

748175 semiconductor manufactured by Sylvania, listed as 748175 (circa 1979).

748174 semiconductor manufactured by Sylvania, listed as 748174 (circa 1979).

748151 semiconductor manufactured by Sylvania, listed as 748151 (circa 1979).

748140 semiconductor manufactured by Sylvania, listed as 748140 (circa 1979).

7484 semiconductor manufactured by Sylvania, listed as 7484 (circa 1979).

7483A semiconductor manufactured by Sylvania, listed as 7483A (circa 1979).

74157 semiconductor manufactured by Sylvania, listed as 74157 (circa 1979).

74100 semiconductor manufactured by Sylvania, listed as 74100 (circa 1979).

749014 semiconductor manufactured by Sylvania, listed as 749014 (circa 1979).

749002 semiconductor manufactured by Sylvania, listed as 749002 (circa 1979).

746004 semiconductor manufactured by Sylvania, listed as 746004 (circa 1979).

744006 semiconductor manufactured by Sylvania, listed as 744006 (circa 1979).

744002 semiconductor manufactured by Sylvania, listed as 744002 (circa 1979).

742991 semiconductor manufactured by Sylvania, listed as 742991 (circa 1979).

742990 semiconductor manufactured by Sylvania, listed as 742990 (circa 1979).

742922 semiconductor manufactured by Sylvania, listed as 742922 (circa 1979).