Ames Document
http://www.amesdoc.com

Ask IEEE
http://ieee.uncoverco.com/ieeehome.htm

CISTI Document Delivery (Canadian Institute for Scientific and Technical Information)
http://www.cisti.nrc.ca/cisti/docdel/docdel.html

ESTIS Document Delivery Service (University of Minnesota)
http://www.lib.umn.edu/estis/

Electronic Ei Text
http://www.ei.org

Information Resources Services (IRS)
http://www.librarianoncall.com/

Linda Hall Library Document Services
http://www.lhl.lib.mo.us/docserv

MIT Document and Literature Search Services
http://libraries.mit.edu/docs/

National Safety Council Services
http://www.nsc.org/lrs/libtop.htm

PLUS Information Service (University California, San Diego)
http://gort.ucsd.edu/capplus/plus.html

Research Investment
http://www.researchinvest.com/new_dd.asp

Speedy Research Service
http://galis.org/srs

Triodyne Inc. Informationa Services
http://www.triodyne.com/

Wisconsin TechSearch
http://www.wisc.edu/wendt/wts/index.html