There is quite the concentration of companies in this area. (What do they do??!)

Research Triangle Park (RTP) is the largest research park in the United States.[1] It is located near Durham, Raleigh, and Chapel Hill, in the Research Triangle region of North Carolina. A small part of the Park stretches into Wake County, but the majority of the land is in Durham County.
http://en.wikipedia.org/wiki/Research_Triangle_Park

* American Association of Textile Chemists and Colorists (AATCC)
* ABB
* Audio Advice, Inc.
* AudioCodes
* BASF
* Bayer
* BE&K
* Becton Dickinson
* Bekaert
* Biogen Idec
* Böwe Bell & Howell
* Centers for Disease Control and Prevention (CDC)
* ChannelAdvisor
* Cisco Systems
* Coleman Insights
* Credit Suisse
* Cree Inc.
* Diosynth
* DuPont
* DynCorp
* Eisai Co.
* EMC
* Environmental Protection Agency
* Extreme Networks
* Family Health International
* Fidelity Investments
* General Electric
* GlaxoSmithKline
* Hatteras Networks
* International Business Machines (IBM)
* ICF International
* iContact
* Instrumentation, Systems, and Automation Society
* Integrated Laboratory Systems
* International Union of Pure and Applied Chemistry
* Intersil
* Intersouth Ventures
* Kendle International
* LabCorp
* Lenovo
* Merck & Co.
* Microsoft
* Monsanto Company
* Motricity
* National Institute of Environmental Health Sciences
* National Humanities Center
* National Semiconductor
* NetApp
* Nortel Networks
* North Carolina Biotechnology Center
* Nufarm
* Ogilvy
* Overture Networks
* Pharmaceutical Product Development
* Quintiles
* RadarFind Corporation
* Red Hat
* Research Triangle Institute
* ReverbNation.com
* S&R Communications Group
* SAS Institute
* Scenera Research
* Semiconductor Research Corporation
* Sigma Xi
* Sony Ericsson
* Southern Capitol Ventures
* Spirent Communications
* ST Ericsson
* Sumitomo
* Syngenta
* Talecris Biotherapeutics
* Tekelec
* Triangle United Way
* Troxler Electronic Laboratories
* Underwriters Laboratories
* United States Forest Service
* United Therapeutics Corporation
* Verizon
* Wyeth


http://www.epa.gov/rtirmd10/faciliti...tour/index.htm