The diodes are for general use and the transistors also in this Exclusive-OR circuit. The circuit may have the values of the resistors changed to 5 V logic.
In the figure, from a documentation from the 70s, we have a few-watt amplifier for general use....
This highly sensitive light sensor was found in a 1970 General Electric documentation. The circuit...
This simple audio oscillator produces signals reproduced on a loudspeaker, in a frequency range...