http://en.wikipedia.org/wiki/Computer_surveillance
Policeware is software designed to police citizens by monitoring discussion and interaction of its citizens. Within the U.S., "Carnivore" was a first incarnation of secretly installed e-mail monitoring software installed in Internet service providers' networks to log computer communication, including transmitted e-mails.
"Magic Lantern" is another such application, this time running in a targeted computer in a trojan style and performing keystroke logging. "Oasis", software developed by Central Intelligence Agency (CIA), is designed for converting intercepted audio into searchable text.
CIPAV, deployed by FBI, is a spyware/trojan allegedly designed for identification of a computer.
The CBDTPA for "Consumer Broadband and Digital Television Promotion Act" was a bill proposed in the United States Congress.
The CBDTPA was known as the "SSSCA" while in draft form, and was killed in committee in 2002. Had the CBDTPA become law, it would have prohibited technology that read digital content (such as music, video, and e-books) without Digital Rights Management (DRM) that prevented access to this material without the permission of the copyright holder.