- Rittal Manufacturer of enclosure systems, electronic systems, enclosure climate control, power distribution products, data communication components, outdoor enclosures and interactive terminals.
- ServerCase.com: Server Rackmounts Offers a wide selection of products ranging from power supplies, PC cases, server cases, 1u, 2u, 3u, 4u, and 5u rackmount cases. Mini ITX barebone.
- Sight Systems Ltd Manufacturer of industrial chassis, embedded controllers, SBCs, display solutions, and power supply equipment.
- Sliger Designs Manufacturer of 19-inch rack cabinets, PC bus industrial chassis, custom rack-mount chassis and special purpose electronic enclosures.
- Spectrum Systems: Computer Enclosures Supplies server architecture products and systems including tower servers, rackmount servers, server cases, enclosures, and server chassis.
- Sunus Suntek Manufacturer of cases and power supplies.