HP Vectra XW Familiarization Manual page 14

Answers and Explanations
5 How do you know which board to take along to the site?
f You ask the client to read you back the model name from the label on
the side of the computer.
g You ask the client to read you back the model number from the label
on the back of the computer.
Response (f) is the preferable one, and indeed this label was designed for
precisely this purpose. It is not always convenient for the client to access
the label on the back of the computer.
Although it is possible for the client to have swapped covers between
computers in similar packages (HP Vectra XW/XU/VT 6/xxx, Series U1/
W1/none), this is not supported by HP. The label on the side should be a
reliable source of information describing the computer.
Response (c) is possible in a last resort, but is prone to error, and
involves undesirable effort on the client's part.
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