It's happening now-plans are being formulated under the coordination of NASA to launch a permanent, manned space station by the year 1990. Studies surveying user requirements, system attributes, and architectural options have been conducted, and you're on the top of these far-reaching considerations on the next big step taken within space! Now that the Shuttle and Spacelab are realities, NASA has set sights on a new horizon-a permanent, manned space station in the high frontier. The precedents have been set-Skylab hosted human visits for up to 84 days, and the Soviet's Salyut was and is a temporary base for cosmonaut crew. The differences are the term and scope of space station living and the accomplishments that can be realized with a permanent site and continuous experimentation within its facilities. Brian O'Leary, writer, astrophysicist, and former astronaut, describes the "tinkermodules" that will be carried to the earth's orbit to be assembled as a space station. His inside track information also lay