Symbian

Symbian Ltd is the software firm that develops and licenses the Symbian OS. Originally spun off from Psion, a maker of PDA devices, the company now focuses on its operating system products. The company is jointly owned by Nokia, Ericsson, Matsushita (AKA Panasonic), Siemens, Sony Ericsson, and Samsung. Motorola was previously a shareholder, but it sold its shares to Psion and Nokia. Nokia later acquired Psion's shares and is now the largest shareholder in the company.

Memory Stick Duo

Memory Stick Duo is a small flash memory card format developed by Sony and based on the original Memory Stick format. An updated version, Pro Duo, was later released that allowed for larger capacities and faster transfer rates than the original. Duo and Pro Duo cards measure 31mm x 20mm in size.

LCD (Liquid Crystal Display)

A liquid crystal display, typically referred to as an LCD, is a flat display technology that uses electrodes and polarizing filters to selectively enable or disable pixels of light to pass from a backlight or reflective backing to the eyes of the viewer. Color displays have 3 such sites per pixel, each with a red, green, or blue color filter, which allows the display to create any number of colors. Most LCD displays used with mobile phones are of the active matrix variety, but some older displays still make use of passive matrix designs. In the future, LCD technology might be displaced in mobile devices by OLED display technology.

Java

Java is an object oriented programming language developed by Sun Microsystems that allows compiled applications to be run on many different and otherwise incompatible platforms through the use of a Java compatible engine developed for each specific platform. Java's mantra is "Write once, run anywhere", which is largely true. Various levels of device capabilities exist, though, requiring the creation of the MIDP 1 and MIDP 2 Java profiles. MIDP 2 applications, which are more powerful, will not run on a MIDP 1 device.

IMAP (Internet Message Access Protocol)

The Internet Message Access Protocol is a network protocol that allows a compatible mail client to access email messages and message folders that are stored on a central mail server. Unlike POP3, which retrieves messages from the server to be read, IMAP clients leave the actual message stored on the server. Additionally, an IMAP server tracks the state of a given message, so that a message that is read and responded to on a mobile device will show on a desktop client as having been read and responded to. This advantage is why IMAP is often used by business users and those that make use of mobile devices to read email. Version 4 of the IMAP protocol is the one most commonly in use today.

IMEI (International Mobile Equipment Identity)

An IMEI is a serial number that uniquely identifies a GSM or UMTS mobile phone. Typically 15 digits long, the IMEI code is broken into sections that provide information about a phone, such as its manufacturer, to the mobile network that the phone is connected to. IMEI numbers of stolen devices are blacklisted in some countries so that the phone can not easily be used by a thief. CDMA's new MEID identifier system is compatible with the existing IMEI structure.