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MIDI

MIDI (Musical Instrument Digital Interface) is a protocol designed for recording and playing back music on digital synthesizers that is supported by many makes of personal computer sound cards.

MIME

Multipurpose Internet Mail Extensions. A protocol defining how messages are sent on the Internet. For example, MIME is used to describe how attachments are encoded and what type of data they contain.

MMS

Multimedia Messaging Service. Logical extension of SMS and EMS. MMS defines a service enabling sound, images and video to be combined into multimedia messages. It supports photo quality pictures, and sounds in WAV, MIDI, AMR, or Melodies format.

MP3

MPEG-1 Audio Layer-3 is a standard technology and format for compression a sound sequence into a very small file (about one- twelfth the size of the original file) while almost preserving the original level of sound quality when it is played.

MPEG-4

The Moving Picture Experts Group, develops standards for digital video and digital audio compression. It operates under the auspices of the International Organization for

Standardization (ISO). MPEG-4 goes far beyond compression methods. Instead of treating the data as continuous streams, MPEG-4 deals with audio/video items that can be manipulated independently, allowing for interaction with the coded data and providing flexibility in editing. MPEG-4 supports a wide range of audio and video modes and transmission speeds.

OS

Operating System, such as Symbian OS, Linux, Microsoft Windows.

OTA

Over The Air. A technology for transmission and reception of application related configuration information in a wireless communications system.

PC

Personal Computer.

PCS

Personal Communications Services, often used to describe GSM 1900 networks.

PDA

Personal Digital Assistant. A handheld computer having functions such as address book, calendar, and so on.

193 Terms and definitions