Thats two counts of failure!

[Aressel]

As usual, computers are just kinda incidental.

Customer calls in to the computer shop looking for an ac adapter for a laptop. (They didn't ask for it directly, but I figured out what they needed)

I ask for the model number of the laptop. Customer responds by describing the head of the power plug. (Thats once!)

That doesn't really help me, and I tell him so. I ask again for the model number, explaining that the adapters are (relitavely) unique to their laptops.

Response: I don't have it with me. I'll call you back. (Thats twice!)

You'd think that people would have learned by now

[Jacen]

You'd think that people would have learned by now

People do. Sometimes. I guess to some people, model numbers are a relatively new concept, lol.

[crazylegs]

SC: Theres more than one type of (accesory)? Dont be ridiculous, give me what I want NOW!
Or
SC: What, you don't remember me, I bought this (Doorbuster deal) and I was the only one, you've got to remember the model number, you know the thing with the wotsit doodad.

Any of those ring a bell?