A AC — Advisory circular ACARS — Airline communications addressing and reporting system ACAS — Aircraft collision avoidance system ADC — Air data computer ADI — Attitude direction indicator ADS — Air data system ADS-B — Automatic dependent surveillance-broadcast AES — Aircraft earth station AFCS — Automatic flight control system AFIS — Automated flight information system (Honeywell) AHRS — Attitude-heading reference system

A report prepared by Freesky Research of Arlington, Va., forecast that private jets will account for over half of all aircraft broadband installations over the next four years, notwithstanding new interest in more-capable cabin electronics and communications systems being offered to airlines.

It's a fact: All those glass cockpits we've been gushing about for years are finally paying a big safety dividend. The number of fatal general aviation accidents declined by 5 percent during the 12 months ending Sept. 30, 2007, the FAA reports. And advanced cockpit technology was given some of the credit.