Soundcard Sockets

Here's the back view of a typical soundcard, showing the three minijack sockets. (The 15-pin D-connector is the MIDI/game interface, which can ignored for the purposes of recording analogue audio):

Here is a detail of the three minijack sockets, showing the identifying legends engraved on the plate:

And here are the sockets commonly found on a PC with built-in sound on the motherboard: