Jack Dorsey is the CEO of Square, the Chairman of Twitter, and a founder of both. Originally from St. Louis, Jack's fascination with urban transit led him to Manhattan, where he programmed real-time messaging systems for couriers, taxis, and emergency vehicles. Through his work, Jack witnessed thousands of drivers in the field constantly updating their location and activity, inspiring the idea behind Twitter. Twitter is a simple network of people sharing stories, ideas, and news instantly, 140 characters at a time. Jack's dedication to simplifying the complex and making technology accessible to everyone everywhere continued with the founding of Square in 2009. Whether a business needs to accept credit cards, manage a full point of sale system, or sell online, Square offers easy and affordable tools so businesses of all sizes can start, run, and grow. The company began with a free credit card reader for the iPhone, iPad, and Android devices, and offers a full suite of hardware and software tools. Jack was recognized as one of Time Magazine's 100 most influential people, WSJ Magazine’s Technology Innovator of the Year, and was named an "outstanding innovator under the age of 35" by MIT's Technology Review. He also sits on the Walt Disney Company Board of Directors.