RadioLAN
Ratoc Systems International
REALmagic (Sigma Designs)
Realtek
RealVision Deltron Technology
Relisys
Repotec
Ricoh
Rise Computer Inc
Rockwell/Conexant (Most comprehensive source for generic Rockwell/Conexant Modems)
Roland
Roxio
    Roxio - Easy CD Creator (Software)
    Roxio - Supported Drive Inquiry Strings
RPTI