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Stupid Line-In and Line-Out Symbols

Another short entry today, but this makes two entries for this week, which makes up for me not posting anything last week...

Anyway, I was hooking up a computer today, so I had to do something which always irritates me. Usually, whoever's around me when I'm hooking up the computer has to listen to me bitch about this, but I figured with a blog, I can bitch to the whole world. The problem is figuring out which damn plug goes to the speakers, and which is for the microphone, and this computer only had a line-in and line-out. Now, I don't know if I'm the only one that gets bothered by this, but tell me, how am I supposed to figure out what these symbols mean:

line-in symbol

line-out symbol

I'm guessing the curves are supposed to represent sound waves, or the microphone or speaker, but what about the arrow? Does it also represent the sound waves, and whether they're going in/out of the computer? Or does it represent the signal wire? To me, that first symbol could be either a speaker with the signal wire running into it, or a microphone with sound going into it. Just like the second could be a microphone with the signal running out of it and back to the computer, or it could be a speaker with the sound going out into the world. Well, since I had to look up this issue to download those symbols, I've learned that the arrow represents sound, not signal cable, so the first image is line-in and the second is line-out (maybe I'll still remember that by the next time I hook up a computer). But seriously, what a completely non-intuitive couple of symbols. I can't imagine how those became the standard that get put on the back of every computer.

Okay, I'm done complaining.

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