IT:
    Ports
    Hacker
    Cryptology
    UNIX
    Linux
    /dev/
    IDNA
    Open Source
    Vulnerabilities
    Protocols
    Magic numbers
    File extensions
    Jacks/Connectors
    Escaping
    Hardware
    P2P
    Lolcat
    Data transfer
    Radio transmission
    UI's
    Man pages
    Desktop environment
    Boolean expressions
    Regular expressions
    Domains
    Editors
    Icons
    Applications
    Charsets
    Hotkeys
    Parameter
    Supercomputer
    Terminal Emulator

Non-IT:
    Animals
    Actors and their roles
    Movies and Series
    Roads
    Drinks
    Food
    T9
    Wars
    SI symbols
    Numberical series
    Phonetics
    Anagrams
    Number crunching
    Capitals
    Bands
    Music
    Emblems
    Intelligence
    Beer
    Leaders, Dictators, Presidents
    Sports
    TV, Cinema
    Newspapers
    Flags
    Chemistry
    Astronomy
    Parties
    Superheroes
    Mosaics
    Energy sources
    Cities
    Structures
    Ads
    Terrorism

Both:
    Languages
    Acronyms
    Mascots
    Brands
    Logos
    Release
    Encoding
    Companies
    Eletronic
    Units
    Books
    Inventors
    Abbreviations
    History
    HID
    Celebrities
    Doodles
    Currencies
    Formulas
    Loanwords
    Artists
    Games
    Rebus / Picture puzzle
    Telecommunication
    Pictograms
    Quotes
    Occupations / Jobs