Single user who has data on her local computer and just wants to understand them better (see SingleUserScenario)
Student who needs to develop a new application for her thesis work (see SingleDeveloperScenario)
Team of people who collaborate on developing a new application (see TeamDevelopmentScenario)
Individual astronomer who wants to perform a complex study on a large, multi-wavelength data set requiring access to several archives (see ComplexMultiWavelengthScenario)
Team working on analyzing data from a common project (see TeamWorkScenario)