42 AVIATION ENGINEERING INFORMATION SERVICES, NAMELY, PROVIDING TECHNICAL, ANALYTICAL, AND OPERATIONAL INFORMATION OF AVIATION SYSTEMS, NAMELY, ON AVIATION MAINTENANCE AND ENGINEERING, AIRPORT INTEGRATED SYSTEMS; CONSULTING SERVICES IN THE FIELDS OF AVIATION SYSTEM OPERATIONS, AVIATION MAINTENANCE AND ENGINEERING, AVIATION STATION OPERATIONS, AVIATION AIR TRAFFIC CONTROL COORDINATION, AVIATION DISPATCH OPERATIONS, AVIATION RAMP OPERATIONS, AVIATION SCHEDULING, AVIATION DECISION SUPPORT, AIRPORT LANDING SYSTEMS, AIRPORT RAMP OPERATIONS, AIRPORT OPERATIONS SUPPORT, AIRPORT INTEGRATED SYSTEMS, AIR TRAFFIC CONTROL OPERATIONS SUPPORT, TRANSPORTATION OPERATIONS SUPPORT