Software Engineering

1. 
Organizations or actors
—the business or operational organizations or personnel 
roles that interact with the software product.
2. 
External systems
—the elements of the computing environment, external sys-
tems, and other software applications that interface with the software product.
3. 
Data stores
—the abstract data repositories that support data storage and 
retrieval transactions.
4. 
Functional sequences
—the sequential flow of data processing actions. Parallel 
threads of behavior can be used to model concurrency or conditional execution 
(selection of execution flow based on business or control rules) of functional 
sequences (see task 11.2.2).
5. 
Data items
—the information elements that represent inputs and outputs of func-
tions (see task 11.2.3).

---