FS2Crew was established in 2004 by an
international team of programmers, graphic artists and airline
professionals who came together to create realistic airline crew
simulations for the Microsoft Flight Simulator series.
The idea behind the FS2Crew concept is a simple one: It's not realistic to fly large airlines like they're Cessna 172's. It's a two person job, and getting an airliner from A to B involves interacting with a lot of different people.
It's the "people element" of airline flying that FS2Crew attempts to model.