What is Graphical User Interface GUI

This chapter presents an application, Join the Board (JTB), which provides shared and collaborative work environments between digital iPhone and iPad devices through a Network of Local Area (LAN) over a Wi-Fi connection. JTB allows using two connection types in the board: an off-line board (the user has a local and individualized work) and an on-line board (the user can create sessions that each one gives a collaborative board. All the devices that are interesting to work in this collaborative board must be joining to this session with a specific role system and start working on it). All the workflow in a collaborative board is through a turn management that is controller by a moderator device. JTB has only been developed for the family of iPad and iPhone version equal or higher than 5.1 operating system and behind using more than six design patterns and implementation. It has been developed three types of different and specific protocols that form the core of JTB application and it have been used for the encoding messages and managing the entire dialog between devices. This chapter shows a full case study that shows the potential of the functionalities.