Companies like Linksys sell networking adapters and even routers that can be tethered by U.S.B. connections to external hard drives.

Routers The companies that make cards also sell wireless routers for about $90 that serve as the hub of a home or small-office network.

Novatel and other companies sell wireless routers that use CDMA or GSM mobile networks to provide Wifi in the car.

Not being in the business of selling routers, not being in any business at all, Aaron Swarz, 17, has a different opinion.

Shares in Enterasys Networks, a company that sells routers and switches to large corporations, fell 61.1 percent yesterday, after the company was downgraded by at least eight analysts.

Foundry Networks, Inc. was a networking hardware vendor selling high-end Ethernet switches and routers.

Nortel added another component to its Internet network products last week with an agreement to sell and install routers made by Avici Systems of North Billerica, Mass.

FON is a Spanish company that sells (and sometimes gives away) wireless routers for people wanting to turn their home networks into public WiFi hotspots.

Router manufacturers now sell routers that have logic enabling them to route traffic for various Classes of Service at "wire-speed".

It sells wireless products and routers.