Electronic entertainment systems have been a considerable boon to helping alleviate the dull side of travel: for a long time, cars have been equipped with radios or cassette players, and commercial airplanes have provided audio programming and a limited selection of movies. Over the past 10 years, pervasive computing technologies have contributed to mobile entertainment's evolving capabilities. Reflecting on this evolution for some of the most popular forms of transportation reveals that although there were initially few improvements, capabilities are now improving at a breakneck pace. This department is part of a special issue on Intelligent Transportation.
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