(2) When used to describe software, portable means that the software has the ability to run on a variety of computers. Portable and machine independent mean the same thing—that the software does not depend on a particular type of hardware.

MobilePlanet
Online shop devoted entirely to portable computing products, Includes laptops, portable accessories, PC cards, global travel aids, and a full line of software titles from the leading manufacturers in portable computing.

Portable Computer and Communications Association
Offers links to their Mobile Connectivity '97 report, standards and mobile connectivity committee activities, white papers, and articles relating to the wireless industry.