H + A
    HA-LO Brand IT Solutions
    Handspring
    Hansol
    Harper Collins (Multicom)
    Hasbro Interactive
    Hauppauge Computer Works
    Havas Interactive
    Hayes Microcomputer Products
    Heidelberg USA
    Hemera Technologies
    Hercules Computer Technology
    Hewlett-Packard
    Hi-Val
    Higher Ground Software
    Hilgraeve
    Hitachi America
    Horizon Technology
    HP/AT&T
    Hummingbird Communications
    Humongous Educational Products
    Hunter Media
    Hyundai Electronics America