-IATA represents the interests of the airlines globally.
-ICAO represents the aviation authorities globally.
-AEA represents the interests of the MAJOR airlines in Europe.
-ECAC represents the aviation authorities in Europe.
-JAA is now EASA: The Joint Aviation Authority (JAA) has now been replaced by the European Aviation Safety Agency known as EASA.
The range of this change is mainly on the regulatory bodies and the Approved Training Organizations (ATO’s) formally known as FTO’s
-EUROCONTROL is the European organ working for a pan-European ATM system. In other words ground control.
-FAA works with the same issues as EUROCONTROL, EASA (JAA) in the USA
Pictures are from Boeing, Airbus , Embraer , and Aviation safety and regulatory bodies, from free non-profit public sites.
Their final use is intended to promote public aviation safety worldwide.