Facebook

1. Data

1.1. Post picture

1.2. Share

1.3. Save Link

1.4. Friend

2. People

2.1. Everybody but people have to email

3. Software

3.1. Application

3.2. Browser

3.3. Firefox

3.4. Safari

4. Hardware

4.1. Laptop

4.2. Computer

4.3. Smartphone

5. Procedure

5.1. Log in

5.1.1. Post someting or check feed