Audiotrak
   Sound and audio cards for desktop PCs.
   http://www.audiotrak.de/eng/index.html

Creative Technology Ltd.
   Manufactures PC entertainment products with a focus on sound cards, including Sound Blaster.
   http://www.creative.com/

Digital Audio Labs
   Sells products that offer a wide range of hardware-based solutions for PCs, used primarily by professional sound recording organizations and individuals.
   http://www.digitalaudio.com/

ESS Technology, Inc.
   PC audio solutions based on the ESS chip platform.
   http://www.esstech.com/

Echo Audio
   Designs and manufactures DSP based audio software and hardware.
   http://www.echoaudio.com/

Ego Systems
   Manufactures desktop media production hardware and software.
   http://www.esi-pro.com/

Lynx Studio Technology, Inc.
   Designs and manufactures professional, computer related audio products.
   http://www.lynxstudio.com

My Gravis Ultrasound Resource Guide
   Information, drivers, programs and links.
   http://iki.fi/jth/gus.html

Reveal
   Download drivers for Reveal products
   http://www.vobis.de/bbs/firmen/reveal/

The PC Technology Guide
   Features and components of a modern PC sound card. Includes graphics, diagrams and an integrated glossary.
   http://www.pctechguide.com/11sound.htm

Timur Tabi's Crystal Semiconductor and OS/2
   Information and opinions regarding Crystal Semiconductor chips for OEM sound cards.
   http://www.tabi.org/timur/crystalos2.html

VideoLogic Online
   Manufacture of sound cards and graphic cards.
   http://www.videologic.com/