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.

Facebook IPO, Nvidia GTC, Diablo 3, and Lenovo ThinkPad X1 Carbon on PCWorld Podcast #138

The PCWorld editors discusses the impact of Facebook's IPO, news from the Nvidia GTC, the launch of Diablo 3, and Lenovo's slick new ultrabook.

TechHive Infographic: 4G LTE Speeds, Verizon vs. AT&T

Our infographic shows each carrier’s average LTE speed in the cities we tested where both LTE services are offered.

Ebook for Tech Travelers Compares U.S. Airport Amenities

PCWorld's "20 Best Airports for Tech Travelers" ebook compiles data on electrical outlets, USB ports, charging stations, Wi-Fi, and more at the nation's 40 busiest airports.

Facebook IPO: Why Your Data Is Worth $104 Billion

Investors will pressure Facebook, the public company, to find new ways of making money from users' personal data. If times get hard, can Facebook do that without endangering user privacy?

smartphone users

Infographic: 4G LTE speeds, Verizon vs. AT&T

Comparison of 4G LTE speeds between Verizon and AT&T in 10 U.S. cities. Who's got the fastest next-gen wireless?

4G Mobile Hotspot Face-Off: AT&T, Verizon LTE Hotspots Fight to a Draw

The AT&T Elevate 4G and the Verizon MiFi 4620 Jetpack are easy to set up and use, and both offer fast speeds--but both suffer from limited battery life, too.

Sprint Launches 'Tri-Fi' 4G Mobile Hotspot

The new Sierra Device will catch WiMAX, LTE and CDMA cell signal and turn it into a little Wi-Fi network for the whole family!

3G/4G Performance Map: Data Speeds for AT&T, Sprint, T-Mobile, and Verizon

Click the map for our neighborhood-by-neighborhood speed test results, as well as Web page and video load times, at each of our 127 testing locations in 13 cities.

3G/4G Performance Map: Data Speeds for AT&T, Sprint, T-Mobile, and Verizon

See our neighborhood-by-neighborhood test results for 127 locations in 13 cities. Click the map for raw speeds, as well as Web page and video load times.