We found this video amplifier with integrated circuits of the time in the magazine Electronics Now of July 1998. The circuit is for analog signals.
An advanced motor control software plug-in for Microchip’s MPLAB® X Integrated Development...
This relay without lock uses a general-purpose transistor. The relay is according to the supply....
This signal follower is from a 1970's documentation. So it uses the traditional configuration at the time...