AARP
A. Epstein & Sons Intl
Abbott Laboratories
ABN AMRO
Advance Bank
Advanced Healthcare
Advocate Health Care
AETNA
Alaris Medical Systems
ALCOA
Alexian Brothers Med Center
Allied Domecq
Allied Worldwide
Alpine, The Care of Trees
Alstom Power Inc.
Amer Acad of Orth Surgeons
Amer Coll of Healthcare Execs
American Medical Association
Amer. Speech Language Hearing Assoc.
Andrew Corporation
Anexsys
Anheuser-Busch
Appraisal Institute
Arkema Chemicals, Inc.
Arrow Electronics
Arthur J. Gallagher
ASCAP
Associated Colleges of Illinois
Bandag Incorp.
Bank of Bermuda
Barton, Inc.
Bayada Nurses
Bell Aliant
Bell South
Bently Nevada
Bestfoods
Best Kosher Foods
Blue Cross Blue Shield of Illinois
Bolt
Bon Secours Health System
Bourgault Industries
BP Amoco
Brandes Investments
Bridgewater Innovations
Buck Consultants
Burroughs & Chapin
Cardinal Health
Caterpillar, Inc.
Catholic Charities
Catholic Relief Services
CEDA-Women Infants Children
Centex Construction
Central CT Coast YMCA
Central Intelligence Agency
Chemtrusion
Chicago Business Mentors
Chicago Transit Authority
Christ Hospital
Ciba Specialty Chemicals Center
Cigna Health Care
Colorado Springs Utilities
Cocal Landscape
Comedy Central
Compass Group North American
Computer Sciences Corporation
Concentra Medical Centers
Constellation Energy Group
Constellation Services
Core Mind
Country Companies Insurance
CNA Insurance
Crete-Monee School District
Crowe Chizek
Crown International
Data Device
DDB Needham
Deloitte Consulting
Dentsply Endodontics
Depository Trust Company
Department of Treasury US Mint
Discover Financial Services
Dole Packaged Foods, Inc.
Douglas,Elliman-Beitler
DSM Desotech
DuPage Prevention Partnership
Eastern Illinois University
Eastern Iowa Community College
Elmhurst Memorial Hospital
Emory University
Environmental Protection Agency
Equity Office
Equity Residential
Estee Lauder
Evang Luth Church in America
EXELON
Federal Bureau of Prisons
Federal Mogul
Filenet Corporation
Fisher-Titus Medical Center
FLSMIDTH, Inc.
Food and Drug Administration
Footstar
Foster Corporation
Frankel & Company
Froedtert Hospital
General Growth Properties
Gerber Products
Girl Scouts of America
Group Health
Gwinnett Tech. College
Hackensack University Med Center
Harrah's Joliet Casino and Hotel
Harris Bank
Harvard University
Health First
HealthQuest I, LLC
Heartland Payment Systems
Heller Financial
Hewitt Associates LLC
Hollister Incorporated
Honeywell Technology Solutions
Household International
HSBC
Hu-Friedy
IEEE
Ingram Book
Internal Revenue Service
International Finance Corporation
Intrntl Fund for Animal Welfare
International Truck and Engine
ISC2
John Deere
Kemper Insurance
Kujawa Enterprises, Inc. (KEI)
Lam Research
LaRabida Children's Hospital
Lawson Products

Levy Security Corp.
Life Source Blood Services
Lockheed Martin
Loews Corporation
MacNeal Memorial Hospital
Maricopa County Sheriff's Office
Maryland Mass Transit Authority
Maryland Aviation Administration
Maximus
McCarthy Construction
Medline
MedStar Health
Merkle Data Technology
Met Life
Metra
Michigan State Un, Coll of Nursing
Mid America Bank
Miniature Precision Components
Missouri Foundation for Health
Mitsubishi Motors No. Amer.
Monitor Group
Morgan Stanley Dean Witter
National 4H Council
National Reprographics, Inc.
Neumann Homes
New York Blood Center
New York City Housing Authority
New York Life
New York Presbyterian Hospital
New York State Banking Dept.
Nextel Communications
Northrup Grumman Corp.
NTN Driveshaft
Nuclear Electric Ins. Ltd
NYC Dept of Personnel
NYC Transportation Authority
One-800 Flowers.com
ONEOK
Ortho Biotech
Park District of Highland Park
Parker Co. Fire Prevention Dist.
Passport Health Plan
Pennsylvania Dept. of Transportation
Pepsi Cola Company
Perrigo
Pershing LLC
Pinkerton
Potomac Electric Power Company
PR Newswire
Proctor & Gamble
Prescotts Supermarkets
Prudential Securities
PSEG Services Corporation
PTI Technologies Inc.
Quest Diagnostics
Quill Corporation
Red Bull North America
Reflexite Corp.
Rehab Institute of Chicago
Resurrection Project
RGA Reinsurance Company
Rheem Manufacturing
Rockwell Automation
Roosevelt University
Rush North Shore Med. Center
Rush-Pres. St. Luke's Med Center
Safilo USA
Sandia National Labs
Secant Medical
Smith Bucklin Associates
Sodexho Marriott
Spartan Computer Services
Specialty Minerals, Inc.
State of Wyoming Administration
Steelcase
Stepan Company
St. Joseph Carondelet Child Center
St. Margaret Mercy Health Care Centers
Suffolk County Community College
Synovate Inc.
Temple Univ. Health
Tetra Tech EM
Teledyne Brown Engineering
The Ken Blanchard Companies
The Levin Group
The Segal Company
The Pingry School
The RADS Group
Thomas Havey LLP
Towers Perrin
Transamerica Distribution Finance
Trenholm State Tech College
Trade Associates Group
Trustmark Insurance
TS Systems
Tucker Knapp
Tufts Un. School of Vet. Med.
Tuthill Corporation
UBS
Uline
UNICEF
United States Air Force
United States Postal Service
University of Chicago Hospitals
University of Dayton
University of Michigan
University of Michigan Health System
Un of IL, Mile Square Health Ctr
US Army Dental Command
US Army Material Command Headquarters
US Department of Defense
US Department of Labor
US Department of Justice
US Environmental Protection Agency
US Marine Corps
US Navy
US Secret Service
Users, Inc.
Vacala Construction
Wake Med Health
Watson Wyatt Worldwide
Wausau Hospital
Wegmans Food Markets
Wells Fargo Indiana-Ohio
Wiss, Janney, Elstner Associates
Worley Parsons
WorldPoint ECC
Wyoming Dept. of Corrections
Wyoming Dept. of Transportation
Wyoming State Training School
Young & Rubicam