FWIW here is my list:

  Business & Industrial - Business Finance - Venture   Capital 

  Business & Industrial - Manufacturing 

  Business & Industrial - Retail Trade - Retail Equipment & Technology 

  Computers & Electronics - Computer Security

  Computers & Electronics - Programming 

  Computers & Electronics - Software

  Proxying & Filtering 

  Internet & Telecom - Email & Messaging

  News 

  Online Communities - Social Networks

  Online Communities - Virtual Worlds 

  Real Estate 

It's pretty accurate but there are quite a few omissions and at least one weird false positive (real estate).