| J&J Electronics | | Sell custom built desktops, notebooks and servers. Provides computer service, networking, Web hosting, Web page design, Coldfusion applications and e-commerce. |
| J's Custom PCs | | Offers an online store, custom built PCs, parts, service, upgrades, and networking. |
| J-Tech Computers | | New and used computers, laptops, printers, monitors and components. |
| Japan Rush | | Offers subnotebooks and hi-tech PCs from Japan. |
| JDR Microdevices | | Offers complete computer systems, computer products and electronics components for businesses and individuals. |
| JHCollier | | Retail sales of desktops, PCs, peripherals and components. |
| Jigsaw | | Sells computers, consumables, software and peripherals. |
| Jmac Electronics | | Online distributor of name brand computer components and peripherals. |
| JPMC, Inc. | | Wholesaler and retailer selling computer parts and components. |
| JS Computer Services | | Retailer of computer hardware, systems and networking for the home, small and medium size businesses. |
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