The iPhone 5 is my device of choice. I use it for business and personal. For business, mainly email, calendar, and texting. For personal, I check the weather and sports scores. (I'm a Giants fan. And I still haven't gotten over Super Bowl XXV.) Uber, StubHub and OpenTable are my most-used apps.

Michael Barrett

Title: CEO, Millennial Media

Previous work: President and founder of Ichabod Farm Ventures LLC; chief revenue officer of Yahoo Inc.; CEO of AdMeld, acquired by Google in 2011.

Age: 52

Education: B.A. in economics from College of the Holy Cross

Family: Married with three daughters

Hobbies: Spending time with family, playing golf and tasting wine

An earlier version misstated Michael Barrett's age due to incorrect information provided. The Sun regrets the error.