IBM WebSphere MQ is a family of network communication software products launched by IBM in March 1992. It was previously known as MQSeries, a trademark that IBM rebranded in 2002 to join the suite of WebSphere products. WebSphere MQ is IBM's Message Oriented Middleware offering. It allows independent and potentially non-concurrent applications on a distributed system to communicate with each other.
Sources:
http://en.wikipedia.org/wiki/WebSphere_MQ
http://www-01.ibm.com/software/websphere/education/crashcourse/#Application_Integration
