Spectra Resources:

To see what your spectrum from the lab should have looked like, or if you want to identify an unknown, use the Aldrich Library of FT-IR spectra which is available only in print in the Chemistry Library.

Some common web spectra resources are:

NIST, Wizard, SDBS, NMRlist, Web Spectra

Apart from Aldrich Library of FT-IR Spectra, the Chemistry Library has print UV, NMR, and C-13 spectra.