h telecommunications, information access and data processing capabilities. Smart appliance: - A household appliance with Internet connectivity. Software-defined radio (SDR): - A radio that can be instantly adapted to accommodate any standard, simply by loading in various programs. Speech application language tags (SALT): - A document language format code that makes speech applications accessible from GUI-based devices, such as PCs and PDAs. Speech integration: - Technology that adds voice services to enterprise phone systems and Web sites. Speech recognition: - See Voice recognition. Steganography: - An encryption technique for hiding a message inside an image, audio, or video file. Surveillance: - The observation of an area or of people or objects. Tag: - An RFID device that contains information about a particular asset. Also a document language format code. TDMA: - See Time division multiple access. Teleconference: - An audio or audio/video conference of geographically dispersed people using a telecommunications network. Telehomecare: - The practice of using medical devices to relay medical information to a caregiver on behalf of a home-based patient. Telematics: - See Vehicular telematics. Telemedicine: - Health care practiced over distance by a network connection. Testbed: - An environment used to test a specific project. Thin Film: - A thin layer of material that's deposited onto a metal, ceramic or semiconductor base. Third-generation services (3G): - High-speed multimedia digital mobile phone services. Time division multiple access (TDMA): - A second-generation (2G) mobile phone technology that interleaves multiple digital signals onto a single high-speed channel. Ultra wideband radio (UWB): - A radio that uses ultra-short pulses to distribute power over a wide portion of the radio frequency spectrum. GLOSSARY Because power density is dispersed widely, UWB transmissions ideally won't interfere with the signals on narrow-band frequencies. Uplink: - A communications channel that sends audio and/or video from