Q:

Supplies UI APIs customised for Quartz. These are in addition to the core Uikon APIs. They fall into two groups: control and dialogs, based on those supplied in EPOC Release 5, customised for Quartz. Similar APIs are present on other device families, though individual device families can withdraw classes that do not require new controls and dialogs that are specific to Quartz.

A generic implementation of the Symbian platform, specialised for particular form factors and use cases. It defines a pocketable communicator with built-in GSM telephony, enabling voice, messaging, and electronic-mail and internet access, closely integrated with personal productivity tools including diary with event and To-Do list managers, and a contacts manager.