Symbian OS
 
Key features of Symbian OS are
 - Suite of application engines.
  Contacts, schedule, messaging, browsing, utility and system control; appointments and business cards; integrated APIs for data management, text, clipboard and graphics.
 
 
             
 - Browsing.
  A WAP stack is provided with support for WAP 1.2.1 .
 
 
 - Messaging.
  Multimedia messaging, enhanced messaging and SMS; Internet mail; attachments; fax.
 
 
 - Multimedia.
  Audio and video support for recording, playback and streaming; image conversion.
 
 
 - Graphics.
  Direct access to screen and keyboard for high performance; graphics accelerator API.
 
 
 - Communications protocols.
  Wide-area networking stacks including TCP/IP and WAP, personal area networking support including infrared, Bluetooth wireless technology and USB.
 
 
 - Mobile telephony.
  GSM circuit switched voice and data and packet-based data; CDMA circuit switched voice, data and packet-based data; SIM, RUIM and UICC Toolkit.
 
 
 - International support.
  Conforms to the Unicode Standard version 3.0
 
 
 - Data synchronization.
  SyncML; PC-based synchronization over serial, Bluetooth wireless technology, Infrared and USB.
 
 
 - Security.
  Full encryption and certificate management, secure protocols, WIM framework and certificate-based application installation.
 
 
 - Developing for Symbian OS.
  Content development options include: C++, Java MIDP 2.0 and PersonalJava 1.1.1a, and WAP.
 
 
 - User inputs.
  Full keyboard, numeric mobile phone keypad, voice, handwriting recognition and predictive text input.