BTIS (Business and Technology Information Service)
http://www.btis.ie/

Boalt Express (U.C. Berkeley)
http://www.law.berkeley.edu/
library/services/bex.html

Employee Benefits Infosource
http://www.ifebp.org/icebdocd.html

Helsinki School of Economics
http://helecon.hkkk.fi/library/

IRRC (Urbana-Champaign, Illinois)
http://www.library.uiuc.edu/
library/irrc/main/irrc_main.stm

Information Express
http://www.ieonline.com/docdel.html

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

Michigan Information Transfer Source (MITS)
http://www.lib.umich.edu/mits/

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

NTIS (National Technical Information Service)
http://www.ntis.gov/search.htm

NYPL Express (New York Public Library)
http://www.nypl.org/express

Purdue Technical Information Service
http://thorplus.lib.purdue.edu/tis/

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