The Lncs Transactions On Modularity And Composition Are Devoted To All Aspects Of Software Modularity And Composition Methods, Tools, And Techniques, Covering Requirement Analysis, Design, Implementation, Maintenance, And Evolution. The Focus Of The Journal Also Includes Modelling Techniques, New Paradigms And Languages, Development Tools, Measurement, Novel Verification And Testing Approaches, Theoretical Foundations, And Understanding Interactions Between Modularity And Composition.this, The First Issue Of The Transactions On Modularity And Composition, Consists Of Two Sections. The First One, Guest Edited By Patrick Eugster, Mario Sdholt, And Lukasz Ziarek, Is Entitled Aspects, Events, And Modularity And Includes Papers Focusing On Context-oriented Software Development, Specifications For Even-based Systems, And Development Of Modular Software.