Mark SullivanSenior Editor, PCWorld

Mark has been writing about networks - social and wireless - since 2005. Independent and outgoing, he enjoys travelling, wine, and skiing. His favorite book is "Atlas Shrugged" by Ayn Rand.

Mobile Accessories for Your Tablet

Pick one of these gadgets to accompany your shiny new tablet and your on-the-go lifestyle.

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AT&T to Launch LTE Service in Five Cities This Summer

Atlanta, Chicago, Dallas, Houston, and San Antonio will be the first cities to get the new service, which is said to be ten times faster than 3G.

Top 10 Songs About (or to) Computers

As computers have become an integral part of life over the past 50 years, many a musician has burst forth in song about them. We track down the best efforts.

Nexus S 4G Review: Gingerbread Phone Gets a 4G Boost

Google and Samsung's joint collaboration is enhanced with Sprint's 4G data speeds, but the Nexus S still has a few hardware oversights.

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Chrome OS Laptops: Google Makes Businesses a Sweet Offer

Companies can replace their old laptops with notebooks running Google’s Web-based OS for just $28 per user per month. Asus and Samsung will sell Chrome laptops for consumers.

Google I/O Day One: 5 Coolest Apps

We searched the developer 'Sandboxes' and found more than a little innovation and inspiration in new apps built on various Google platforms.

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LG Optimus Black Review: An Impressive Though Modest Android Phone

This 3G phone won’t break any speed or performance records, but its stylish design and no-nonsense user interface may be just right for some users.

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Privacy Lost: The Amazing Benefits of the Completely Examined Life

It's time to stop complaining and start appreciating the advantages of the open-source you.

Verizon's New 4G Mobile Hotspots: Samsung Wins in Split Decision

Verizon now sells two equally-priced 4G LTE mobile hotspots--one a Samsung and the other a Novatel MiFi. While the Samsung has its defects, its slightly faster speeds and longer battery life earn it the nod as the better of the two products.

Samsung’s Droid Charge a Strong Second LTE Phone for Verizon

The LTE speeds dazzle, the AMOLED display shines, and you get a free mobile hotspot at least for a little while. What’s not to like? Well, the battery life disappoints, but that may not be enough to spoil the fun.

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Smartphones Are All Alike, Let’s Have a Price War

The phone makers seem to be settling on a common set of features and functions, while data services might be headed for speed overkill. The only battlefield remaining will be price.

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A Market for iPads, Not for Tablets

The iPad is selling like gangbusters because of the Apple-ness of it, not because of the tablet-ness of it.

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Sprint Spits Fire at AT&T-Mo FCC Filing

AT&T filed documents with the FCC today seeking approval of the company’s planned $39 billion acquisition of T-Mobile, and Sprint had some harsh words about it.

4G Speed Tests, Cleanup Utilities, and the Death of Flip on PCWorld Podcast #111

This week, we clue you in on how we tested 4G phone speeds across all the major networks, multiple cities, and a dozen cites per city. Also, an early peek at the results of our testing of PC cleanup utilities, and a discussion about why Cisco killed the Flip.

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Facebook Goes Green with Data Center Revamps

The data centers are the home of Facebook's most valuable asset, your personal information.