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Messages

Messages is an instant messaging software application developed by Apple Inc. for its OS X and iOS operating systems. The desktop Messages application replaced iChat as the native OS X instant messaging client with the release of OS X Mountain Lion in July 2012. While it inherits the majority of iChat's features, Messages also brings support for iMessage, Apple's messaging service for iOS, as well as FaceTime integration. The mobile version of Messages on iOS used on iPhone and iPad also supports SMS and MMS due to replacing the older text messaging Text app since iOS 3. Users can tell the difference between a message via SMS and one sent over iMessage as the bubbles will appear either green (SMS) or blue (iMessage). [Messages (application). Wikipedia]
Messages
Messages, Messages icon,