The major changes taking place in technology have some of the greatest effect in the world of aviation. Yet, in an industry which started with the concept of 'open skies', each sector has traditionally developed on its own and adjusted to developments in other areas as and when required. The need for integration is particularly important as the skies become increasingly crowded. More intense commercialization dramatically increases the interlocking between technological developments and the size of the financial investments required. For maximum efficiency the aviation system thus has to...