Diverse Networks, Inc.  
   Specialize in the design, deployment, and operation of wireless data communication networks.
   http://www.diversenet.com/

DS3 Computing Solutions  
   Provides clients with all their computing needs from Network design, WAN engineering, internet services, internet technologies, consulting and company staffing.
   http://www.ds3cs.com/

Digital Equity  
   Focuses on the design, development, and implementation of intranet and extranet systems. Based in Irving, Texas.
   http://www.digitalequity.com/

Digital Friends Inc.  
   Provides industry certified network support to smaller businesses.
   http://www.digitalfriends.ca/

Datatec Systems, Inc.  
   Deploys and integrates business technologies, computer networks and software, which assists customers in improving business performance, while saving time and money by implementing information technology solutions quickly and effectively. (Nasdaq: DATC).
   http://www.datatec.com/

DynTek  
   Develops computer software products and provides computer network related services and consulting. (Nasdaq: DYTK)
   http://www.dyntek.com/