TANGOS - slang for terrorists
TARGET - target (person, place etc) of intelligence agency's interest
TERMINATED - assassinated
TERRORIST Organizations
TORTURE
THREATCON - Threat Condition (replaced by FPCON)
TRADECRAFT - proficiency / experience in espionage
TRAFFIC ANALYSIS - communication patterns examined to determine information they might carry (even secure communications which cannot be decrypted)
TRUTH DRUG \ TRUTH SERUM - A truth drug (or truth serum) is a drug used for the purposes of obtaining accurate information from an unwilling subject, most often by a police, intelligence, or military organization on a prisoner.
UAV - unmanned aerial vehicle - controlled remotely, this can be as large as a plane or as tiny as an insect with implanted microchips and sensors
UKUSA - a SIGINT alliance consisting of the English Speaking countries (UK, USA, Canada, Australia, New Zealand). Its main purpose is to operate the Echelon
UNIT 8200 - Elite unit of the Israeli Military
VOICE STRESS ANALYSIS (VSA) is a controversial technology that attempts to examine and measure a physiological stress component, by extracting micro tremors from the voice of a person and measuring their amplitude. Voice stress analysis is often applied as a type of lie detector. The technique's effectiveness remains debated. Multiple studies have concluded that VSA's accuracy at determining a subject's truthfulness is not significantly better than chance. However, many police and intelligence agencies have alleged that VSA is indeed useful in determining a person's truthfulness.
WALK-IN - someone who volunteers to offer its services as an agent
WATCH LIST - contains paople who are of interest to intelligence agencies
WET JOB / WORK - euphemism for murder, assassination
WHITE SOUND, PINK SOUND - emitted to foil electronic eavesdropping devices