Figure 2-6 should include lines between Money and Proprietary Bank System and between Mutual Fund Program and CheckFree. Here's a corrected figure:
p. 44: In the last paragraph, "When you ask Netscape to show you a list of sites related to the current one you're looking it, your browser connects to a CGI program running on a Netscape server." should be "When you ask Netscape to show you a list of sites related to the current one you're looking at, your browser connects to a CGI program running on a Netscape server."