Wiki           a type of collaborative website that allows users to create, add, modify, or delete the website content via a browser.

 

 

 

 

 

 

 

Collaboration          enable users to share and edit any type of project, including documents, photos, videos,

                                     designs, prototypes, schedules, and more, often at the same time.

                                     enable users to communicate via chat windows, and some provide a whiteboard.