Hardware 
Expert computer hard disk data recovery and repair services. Repairs laptops, notebook, desktop, workstations, and servers such as HP Proliant raid 5 servers and any computer: Apple, IBM, HP, Dell, Toshiba, Sony, Gateway, or Asus. Fast 24 hr disk rescue.
http://www.sherlockdatarecovery.com/
Staten Island, NY based presents laptop repairs and data recovery services.
http://www.800tech.com/
PC sales and service and IT solutions including upgrades, repairs, troubleshooting, virus removal, custom builds, and using quality hardware. Based in New Zealand.
http://www.brontobyte.co.nz/
A guide with pictures describing how to build a PC computer.
http://www.build-pc-guide.com/
A complete step by step guide to building a computer. A look at the pros and cons plus a complete overview of each component.
http://www.co-train.com/
Offers the best prices on used computer hardware and used computer equipment. Computer leases, computer rentals, and used servers.
http://www.canvassystems.com/
Provides free information on all types of network cabling, including how to build, crimp, and punch-down category 5 cables.
http://www.cat-5-cable-wiring.com/
A guide to buying cheap computers and parts with information on building computers. Features computer parts buying guides.
http://www.cheap-computers-guru.com/
Provides information how to evaluate, perform and build a personal computer with cheap components. Articles about the different components and links.
http://www.cheap-computers-reference.com/
10. Cyber-Test
Offering repair service on all makes and models of computers and computer peripherals.
http://www.equipfix.com/
Buys and sells used network hardware including routers, switches, access servers and from Cisco, Juniper, Extreme, Foundry, Redback, Lucent, Nortel, Riverstone. Based in Stanhope NJ, USA.
http://www.dni-llc.com/
A world leader in data acquisition, image analysis, and machine vision hardware and software products such as PCI and USB Boards.
http://www.datx.com/
13. Drive My Laptop
UK based Centretek Ltd focuses on upgrade and replacement hard drives and CD, DVD drives for laptop computers.
http://www.drivemylaptop.co.uk/
14. GPU Review 
Michael Thomas's video card review site. Offers pictures, benchmarking, specifications, card comparisons, and links to other reviews.
http://www.gpureview.com/
A guide to printer inkjet cartridges with information on HP, Epson, Canon, Lexmark, Brother, Xerox and Dell genuine and compatible printer inkjet cartridges.
http://www.ink-cartridge-guide.com/
16. Lap Top Info
Guide covering major products and peripherals, also history of laptops.
http://www.laptopinfo.co.uk/
17. Multibyte
Service and sale of computers and portable workstations. Also networking, web site, and search engine optimization services offered. Located in Bologna, Italy. In Italian.
Assistenza tecnica vendita Computer portatili usati siti web reti lan Bologna.
Assistenza tecnica vendita Computer portatili usati siti web reti lan Bologna.
http://www.multibyte.it/
Community and product information for Organic Light Emitting Diodes.
/lang=de Plattform für die neue Display Technologie OLED/PLED
/lang=de Plattform für die neue Display Technologie OLED/PLED
http://www.oled-display.net/
19. RFCables.org
Offers technical articles and product reviews about RF cables and RF connectors.
http://www.rfcables.org/
20. The ChipList
Processor portal bringing detailed information on the various processors used in PC's and servers. Covers news, market analyses, specifications, overview tables, roadmaps, benchmarks, and system tests.
http://www.chiplist.com/
21. TuningPages.com
Overclockers database. For PC overclockers ready to push the limits of their computers. Information on testing and improving hardware and comparisons of results with hundreds of other members' computers.
http://www.tuningpages.com/