This small add-on looks like a hockey puck and lets you plug in a variety of devices. This small add-on looks like a hockey puck and lets you plug in a variety of devices. Barbara Krasnoff is ...

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Many laser printers last for years, so businesses often keep older laser printers around even after upgrading other hardware. Many older laser printers use a parallel port interface rather than the ...

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Modern laptops come with a dizzying array of ports—or maybe only one, in the case of some extremely svelte ultraportables. But how can you know what they all do, or what you might want in a new system ...