This article is from the Technical Books FAQ, by Sethu R Rathinam firstname.lastname@example.org with numerous contributions by others.
The lists of online library catalogs are available for anonymous
ftp on ftp.unt.edu, in the directory library. Read the aaareadme.txt file
for an index. The file you probably need is libraries.txt or libraries.ps
From this list, you can get the directions for accessing the on-line
catalog of the university nearest you.
One extensive university catalog accessible by telnet:
The University of California
220.127.116.11, 18.104.22.168, 22.214.171.124, 126.96.36.199
for journals and books.
The Library of Congress catalog is dra.com or 188.8.131.52
I have heard it is not comprehensive, and not as big as MELVYL.
Credits: Yoshiyasu Takefuji