741255 semiconductor manufactured by Sylvania, listed as 741255 (circa 1979).

74LS175 semiconductor manufactured by Sylvania, listed as 74LS175 (circa 1979).

74LS138 semiconductor manufactured by Sylvania, listed as 74LS138 (circa 1979).

3N213 semiconductor manufactured by Sylvania, listed as 3N213 (circa 1979).

3N208 semiconductor manufactured by Sylvania, listed as 3N208 (circa 1979).

3N207 semiconductor manufactured by Sylvania, listed as 3N207 (circa 1979).

3N206 semiconductor manufactured by Sylvania, listed as 3N206 (circa 1979).

3N205 semiconductor manufactured by Sylvania, listed as 3N205 (circa 1979).

3N204 semiconductor manufactured by Sylvania, listed as 3N204 (circa 1979).

3N203 semiconductor manufactured by Sylvania, listed as 3N203 (circa 1979).

3N202 semiconductor manufactured by Sylvania, listed as 3N202 (circa 1979).

3N201A semiconductor manufactured by Sylvania, listed as 3N201A (circa 1979).

3N201 semiconductor manufactured by Sylvania, listed as 3N201 (circa 1979).

3N200 semiconductor manufactured by Sylvania, listed as 3N200 (circa 1979).

3N187 semiconductor manufactured by Sylvania, listed as 3N187 (circa 1979).

3N177 semiconductor manufactured by Sylvania, listed as 3N177 (circa 1979).

3N176 semiconductor manufactured by Sylvania, listed as 3N176 (circa 1979).

3N175 semiconductor manufactured by Sylvania, listed as 3N175 (circa 1979).

3N159 semiconductor manufactured by Sylvania, listed as 3N159 (circa 1979).

3N152 semiconductor manufactured by Sylvania, listed as 3N152 (circa 1979).