Air Traffic Control principles: separation, traffic density, control, coordination, decision making. Air Traffic Management automation methods: automation tools (STCA, MTCD, Flight Data Processing System FDPS, Controller Pilot Data Link Communications CPDLC, Mode S Enhanced, Automatic Dependent Surveillance / Broadcast ADS/B), ATCO robots, Free Flight based on ADS/B, ACAS/TCAS, FANS, Airborne Separation Assurance System (ASAS), Simultaneous Flight and Traffic Management System (SFTMS) based on Total Costs and Risks. De-conflicted 4D Trajectory Based Operations (DC 4D TBO)