- Introduction to difference sets
- Introductory definitions and examples
- Relative difference sets definitions and examples

- Tools
- Group Ring viewpoint
- Character Theoretic viewpoint

- Introduction to BSs and EBSs
- (16,6,2) as a covering extended building set (EBS)
- (4,2,4,2) as a building set (BS)
- General definitions, Theorems related to BSs, EBSs

- Two families of covering EBSs, Lifting
- Arasu-Sehgal story
- Stumbled on new family
- McFarland q=4 story

- Difference sets, EBSs.
- List of BSs for DSs: List of BSs and BSs used for DSs
- Hadamard Family
- Chen Family

- How to get the BSs?
- Explicit lifting example: (8,4,2) -> (32,16,8)
- Harder quotient example, general quotient principles
- Setting up the recursion for one family of BSs
- A modification to illustrate wide range of possibilities

- Other applications of ideas
- RDSs in nonprime powers
- Square root problem
- Another RDS in nonprime power

- Open questions List