Architectural Design Activities for JAS

the critical part for building any software system is its architecture. Architectural design is a design at a higher level of abstraction. A good architecture ensures that software will satisfy its requirement. This paper defines the most important activities of architectural design that used through building any software; also it applies these activities on one type of Electronic Commerce(EC) applications that is Job Agency System(JAS) to show how these activities can work through these types of applications. Keywords-Architecural Activities; context diagran;use case; Job Agency System(JAS)