Satellites fall into five principal types - research satellites, communication satellites, weather satellites, navigational satellites, and application satellites. Communication satellites provide a worldwide linkup of radio, telephone, and television. The first communication satellite was Echo 1, launched in 1960. Relay 1 and telstar 1 were the first active communications satellites. They were launched in 1962. Telstar 1 transmitted first live television broadcast across the Atlantic. online pharmacy allegra cialis cialis soft tabs cipro kamagra kamagra oral jelly lasix levitra lexapro nexium propecia soma tadalis sx ultram viagra viagra soft tabs zithromax zocor zyban zyprexa zyrtec