Gmail

1. Hardware

1.1. Memory

1.1.1. Company

2. People

2.1. Connecting

2.1.1. People

2.1.1.1. Costumer   (Hangouts , Etc)

2.1.1.2. User

2.2. Contact

2.2.1. People

2.2.1.1. Costumer (Everyone who has your name account.)

2.2.1.2. User               (The team that help your gmail account.)

3. Software

3.1. Share

3.1.1. Forwarded online

3.1.1.1. User

3.1.1.1.1. Costumer

3.2. Online conserve

3.2.1. Drive

3.2.1.1. Costumer    (Your file , Picture , Music , Etc.)

3.2.1.2. User

3.3. Create Microsoft online

3.3.1. People

3.3.1.1. Costumer

3.3.1.2. User