27.20.00 Data Communications
27.25.00 Data Communications Software
27.25.13 Virus Protection Software 27.25.16 Application Suites 27.25.19 Email Software 27.25.23 Graphics/Multimedia Software 27.25.26 Customer Relationship Management Software 27.25.29 Operating System Software 27.25.33 Database Software 27.25.37 Virtual Private Network Software 27.25.39 Internet Conferencing Software