CID

Cylish Identification Device - Or CID, is a system of software uploaded in one's mind. It helps with day to day activities such as communicating with other CID users, giving directions, showing off helpful holograms, helping with persionall finance, searching information, and much more.

Impacts on the storylines
The CID chip had a great effect in The Tale of Two Chips and /How to date your dragon, part 2/