OOA - Object-Oriented Analysis - is based upon concepts that we first learned in kindergarten: objects and attributes, wholes and parts, classes and … - Edward Yourdon

Subject. A Subject is a mechanism for guiding a reader (analyst, problem domain expert, manager, client) through a large, complex model. Subjects are also helpful for organizing work packages on larger projects, based upon initial OOA investigations.

[Object-oriented analysis is] the challenge of understanding the problem domain and then the system's responsibilities in that light.

Elements (lines of code) in a coincidentally-cohesive module have no relationship. Typically occurs as the result of modularizing existing code, to separate out redundant code.