After repeatedly denying that it would do so, Compaq-the leading seller of PCs-has now begun selling PCs over the Web as well as through dealers. The URL is http://www.compaq.com/athome/store/. Prices appear to be at least five percent lower than the best prices available from dealers. Dell, currently the largest direct seller of PCs, became the fourth largest PC vendor in the industry by focusing on direct sales. To order online from Dell go to http://dell.com/.