Each company not only operates passenger flights but cargo shipping, ground services,
maintenance and overhaul services, as well as many other services related to their core business.
The most diversified company is Deutsche Lufthansa AG having developed from an airline into
an aviation group comprising several subsidiaries and affiliates (e.g. Thomas Cook AG, a travel
agencies networks and Condor, a charter airline). The company is the world market leader in
catering in terms of market share, though its catering service continues to incur considerable
losse