In 1949 the term was used to describe a dissatisfaction with modern architecture, and led to the postmodern architecture movement, perhaps also a response to the modernist architectural movement known as the International Style.
The current DUATS service contractors are Computer Sciences Corporation (CSC) and Data Transformation Corporation (DTC). The service may be accessed by direct dial (using a terminal emulator like HyperTerminal), and the Internet via Telnet or HTTP. Update: The FAA terminated DTC's DUAT contract as of July 15, 2015.
MSDTC is an acronym for Microsoft Distributed Transaction Coordinator. As the name says, MSDTC is a Windows service providing transaction infrastructure for distributed systems. In this case, a transaction means a general way of structuring the interactions between autonomous agents in a distributed system.