 such, GPRS will likely be used for qualitative information services when end users have GPRS-capable devices, but SMS will continue to be used for delivering most quantitative information services. Interestingly, chat applications are a form of qualita- tive information that may remain delivered using SMS, in order to limit people to brevity and reduce the incidence of spurious and irrelevant posts to the mailing list that are a common occurrence on Internet chat groups. Still Images Still images such as photographs, pictures, postcards, greeting cards, pre- sentations, and static Web pages can be sent and received over the mobile network as they are across fixed telephone networks. It will be possible with GPRS to post images from a digital camera connected to a GPRS radio device directly to an Internet site, enabling near real-time desktop publishing. Moving Images Over time, the nature and form of mobile communication is getting less tex- tual and more visual. The wireless industry is moving from text messages to icons, picture messages to photographs, blueprints to video messages, movie previews being downloaded, and on to full-blown movie watching via data streaming on a mobile device. Sending moving images in a mobile environment has several vertical market applications including monitoring parking lots or building sites for intruders or thieves, and sending images of patients from an ambulance to a hospital. Videoconferencing applications, in which teams of distributed salespeople can have a regular sales meeting without having to go to a par- ticular physical location, are another application for moving images. Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright © 2004 The McGraw-Hill Companies. All rights reserved. Any use is subject to the Terms of Use as given at the website. GPRS Introduction Chapter 2 Web Browsing Using circuit-switched data for Web browsing has never been an enduring application for mobile users. Because of the slow speed of circu