Entity Relationship Diagram for System Analysis and Design

'Sup. This is to explain further about some technical topics that students might find overwhelming in SAD. The topics in question are: Context Diagram, Data Flow Diagram, Entity-Relationship Diagram (ERD), and Normalization (Unnormalized table -> 1NF -> 2NF -> 3NF).

In order to clarify those topics, some external resources are listed and included in this post.

Entity Relationship Diagram:

1. Tameemyousaf's ER-D in simple words and  easy to understand notations:

Entity relationship diagram (erd) from tameemyousaf

2. How to Draw an Effective ER diagram by Tech_MX

How to Draw an Effective ER diagram from Tech_MX

3. PDF: Weak Entity?

4. More on ER-D entity types.

http://web.cse.ohio-state.edu/~gurari/course/cse670/cse670Ch2.xht

5. We have a different way of showing cardinality, either using crow's foot or using numbers (1:N)

I hope students and lecturers alike will find the information above useful.