"Mimicking their larger brothers are the portable solutions, devices from IMS, Digecor, eDigital, Phantom Media and others have provided thousands of seat viewings. Portables are here to stay and, with increasing hard disk size and improved battery life, have guaranteed a continued lease on life and promise to be a common sight especially on single aisle planes. Choice is also a growing solution in the portable arena."

http://www.airfax.com/airfax/features/viewstory.asp?filepath=may2007\ims.htm