JTA - Java Transaction Architecture

JTA defines a standard API that applications can use to access transaction monitors.
JTS is a basic implementation of a CORBA OTS transaction monitor. JTS specifies the implementation of a Transaction Manager that supports the Java Transaction API (JTA) specification at a high level and implements the Java mapping of the OMG OTS specification at a low level. A JTS Transaction Manager provides transaction services to the application server, the resource manager, standalone applications, and the Communications Resource Manager.