The handbook is a user's guide for a prototype air traffic flow control automation system developed for the FAA's System Command Center. The system is implemented on a time-sharing computer and is designed to provide airport traffic load predictions and flow control support. The User's Guide is a reference manual designed for use by the air traffic controllers and does not require any previous computer experience. The AIRS request (command) language is explained along with instructions on using remote teletype and graphical display terminals in working with the time-sharing computer. The manual tells the user how to obtain airport traffic demand data, flight listings, plots, arrival delay predictions and flow control assistance. It also describes how to enter operational data such as landing capacity estimates and how to add (or cancel) flight schedules to the AIRS centralized data base. (Author).