MobileMe was a service provided by Apple that was introduced at the WWDC on June 9, 2008. It enabled users to wirelessly sync e-mails, contacts, calendar, and other data between an iPhone and their computer. On June 30, 2012, Apple stopped MobileMe and all MobileMe related services, and today, a similar service is known as iCloud.
Apple terms, CamelCase, iWeb, .Mac
