Abstract
The world produces between 1 and 2 exabytes (10
18 bytes) of information each year--about 250 megabytes for every man, woman, and child on earth. [Lyman, Peter and Hal R. Varian, How Much Information, 2002,
http://www.sims.berkeley.edu/how-much-info] Therefore better tools and technologies for information access and information management are needed to take full advantage of ever-increasing amounts of digital information. The discussion here will focus on technologies for accessing unstructured, digital multimedia and other complex information, including text, Web pages, images, video, voice, audio, and graphics (both 2-D and 3-D).