- 3 Com Corp.
- 3M
- A123 Systems
- A.T. Kearney, Inc.
- Abbott Laboratories
- Accenture
- Acme Plastics
- AEC, Wood Dale II
- Alarm.com
- Albany Chicago Company
- Alcatel
- Allstate Insurance
- Alltel
- American Air Liquide
- American Express
- America's Growth Capital, LLC
- Ameritech
- Andrew Corporation
- Appian Corporation
- Apple Computers, Inc
- AT&T Business Services
- Automated Systems, Inc.
- Bank of America
- Barclays Capital
- Baxter Healthcare
- Becton Dickinson
- Beltone Electronics
- Berkshire Capital Securities
- Bison Gear
- BlackRock, Inc.
- Bloomberg L.P.
- Booz Allen Hamilton
- Boston Consulting Group
- Boston Scientific
- Bovis Lend Lease
- Cannondale Associates
- CapGemini
- Capital One
- Cardinal Health
- CarMax Auto Superstore
- Case Corporation
- Caterpillar
- CGN and Associates
- Charles River Associates
- Chevron Texaco Global Company
- Chicago Water Reclamation Dept.
- Cisco Systems
- Citibank
- Clark Construction
- Clerisy Group
- Clorox Co.
- CMI International
- CNH Global
- Comscore Networks
- ConAgra Foods, Inc.
- Constellation Energy Group
- Constructive Technologies Group
- DC Energy
- Deloitte Consulting
- Descartes Capital
- Deutsche Bank
- Discover Financial Services
- Duke Management Company
- DuPont
- Edwards LifeSciences
- Ellman International
- Emerson Process Management
- EnerNoc Inc.
- Ernst & Young LLP
- Exelon Corporation
- Exeter Group, Inc.
- ExxonMobil
- Fermilab
- FHC Inc.
- Fletcher Spaght, Inc.
- Ford Motor Company
- GE Aircraft Engines
- GE Energy
- GE Healthcare
- GE Medical Systems
- GE Power Systems
- General Electric
- General Mills
- General Motors
- GlaxoSmithKline
- Goldman Sachs
- Google
- Greenbrier & Russel
- Hamilton Sundstrand
- Hasbro
- HDR
- Hewlett Packard
- Honeywell
- Husky Injection Molding Systems
- Hypertherm
- IBM
- IBM Microelectronics
- Indium Corporation
- Intel Corporation
- International Truck & Engine Corp.
- ITW Hi Cone
- J. G. Sullivan Interactive Inc. Klein Tools
- John Deere
- Johnson & Johnson
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- JP Morgan
- Koegel Associates, Inc.
- Kohler
- Kraft Foods
- LECG Consulting
- Lehman Brothers
- Littelfuse, Inc.
- Lockheed Martin
- Loyola University
- Lucent Technologies
- Manasc Isaac Architecture
- Manhattan Associates
- Marketing and Planning Systems (MaPS)
- Mascoma, Inc.
- McKinsey Consulting
- McMaster-Carr
- Mechanical Technology, Inc. (MTI)
- Medtronic
- Mercator Partners
- Mercer Management Consulting
- Merchants Metals
- Merck & Co.
- Merrill Lynch
- Metropolitan Water Reclamation
- Microsoft
- MicroStrategy
- Mitsubishi Electric Automation
- Mobil Products
- Monitor Software
- Motorola
- Nabisco
- Navigation Tech
- Navistar
- Nissan Motor Company, Ltd.
- Nortel Networks
- Northrop Grumman
- Northwestern University Med. School
- Oliver Wyman
- Open TV Inc.
- Opera Solutions
- Pacific Assets, Ltd./Thailand
- Parker Hannifin
- Parsons
- PB Consult, Inc.
- PCS-NI Technical Operations
- Perceptron Inc.
- Pharmaceutical Systems
- Pharmtech, Inc.
- Philips
- Piasecki Aircraft Corp
- Point Innovation
- PriceWaterhouseCoopers
- Prudent Energy
- Raymond James
- Raytheon Company
- Raytheon Integrated Defense Systems
- Ricardo, Inc.
- RTI International
- S&C Electric
- Samsung Electronics
- Sapient Corporation
- SAS Institute
- SBC/Ameritech
- Schlumberger, Ltd.
- SES Americom
- Shell
- Shure, Inc.
- Siemens Building Technologies
- Siemens Medical Solutions
- Skanska USA Building, Inc.
- Skil-Bosch Power Tool
- St. Jude Medical
- Steve & Barry's University Sportswear
- Stratos Lightwave, Inc.
- Tamarack Energy, Inc.
- Tellabs Operations, Inc.
- Textron
- The Boeing Company
- The Vanguard Group
- TIAX, LLC
- Timken Aerospace
- T-Mobile USA
- Transpora
- Trinity Partners
- U.S. Patent and Trademark Office
- UBS
- Underwriters Labs
- United Airlines
- United Postal Service
- United Resource Networks
- United States Army
- United States Navy
- USA Hoist Inc.
- USG Corporation
- Videojet Technologies, Inc.
- Visteon
- Wachovia Securities
- Walt Disney World
- Wily Technology
- WMS Gaming
- World Bank
- ZS Associates
- Zurich Insurance
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