Cablepus
This is handy, Gizmodo put together a super guide on all the AV cables and more you might need, have or will end up telling your parents they need when they want to hook up that thing to the other thing…

We put up with too many cables. There are at least four different kinds of USB plugs, two kinds of FireWire and like a million different ways to connect something to TV or monitor. Modern gadget life can be kind of retarded in this way. Why not one kind of cable, or just a couple? I don’t know. But until everyone gets on the same appendage-to-hole scheme, in the meantime, you can use this: an illustrated guide to pretty much every kind of cable you will see in current gadgets and what it’s used for (unless, you know, Sony springs a new one on us overnight, which is honestly possible).