Prior to the airline hijackings on Sept. 11, 2001, the Federal Aviation Administration's "no-fly list" contained 11 names.

Soon after the attacks, the Transportation Security Administration was created, and given direct authority over airline security screening and the watch list. The list soon began to expand almost daily, according to government documents. The last credible report on the list put its length at 119,000 names, though the TSA says it has since narrowed it to a smaller number that must remain a secret.

While it was expanding the no-fly list, the TSA was also busy carving out a second list of people who were allowed to fly, but would be screened extra closely on their way to the gates. The government initially denied this "selectee list" existed, but a watchdog group eventually got the goods in a Freedom of Information Act request.

Of course, the TSA isn't the only agency making lists these days. Here's a quick Wired News field guide to post-9/11 watch lists.

The warrantless cyber-search was justified by the "special needs" exception to the Fourth Amendment, because "the administrator reasonably believed the computer had been used to gain unauthorized access to confidential records on a university computer," the U.S. 9th Circuit Court of Appeals ruled Thursday.