SAR

The SAR, or specific absorption rate, of a mobile phone is the amount of RF energy it exposes its user to. In the United States, mobile phones need to have a SAR rating of 1.6 watts per kilogram (W/kg) or less. In Europe, the limit is 2 W/kg. While there have been plenty of studies that conclude that phone based RF radiation is harmful, there are an equal amount that find the opposite to be true. In any event, a device with a lower SAR rating will pose less of a risk than one with a higher rating.

S90

S90, previously known as Series 90, is the software platform that Nokia runs on top of the Symbian OS in its 77xx series of touchscreen enabled multimedia devices. Nokia has announced that S90's functionality will likely be folded into the S60 platform, and that S90 will cease to be developed.

OLED

OLED is a newer display technology that creates displays that are less power hungry than existing LCD technologies. OLED displays are more efficient than LCD displays because OLED pixel sites use organic materials that produce their own light, removing the need for a backlight. Currently OLED devices are still somewhat prone to performance degradation over time, which is one of the reasons they have not replaced LCD displays on a wide scale in mobile devices.

SMTP

SMTP is short for Simple Mail Transfer Protocol, an application protocol used to send mail from one user to another. it is the standard for email transmission used on the Internet. SMTP does not provide a method for an end user to read email, rather it simply makes sure that the mail gets to the user's home mail server.

NTT DoCoMo

NTT DoCoMo is Japan's largest wireless network carrier. They offer 2G PDC service and were the first in the world to offer 3G service with their WCDMA based FOMA network. The company is the developer and licensor of the i-mode internet browsing system for mobile phones.

MMC

MultiMediaCard is a flash memory card format introduced in the late 1990s. It is the precursor of the much more popular SD card. It is not used often today.

Memory Stick Micro

Memory Stick Micro, commonly referred to as M2, is a small fingernail sized memory card format that is part of Sony's Memory Stick family. The cards measure about 15mm x 13mm in size, which is about the same as the competing microSD card format. M2 cards can be used in slots meant for larger format Memory Stick cards through the use of an adapter. The format can support capacities of up to 32GB in size.

S40

S40 is the platform that Nokia runs on its feature phone handset models. Unlike S60, it does not run on top of the Symbian OS, but rather runs on a fully proprietary system. Formerly known as Series 40, the system generally only allows the user to install Java based applications instead of the native applications that can be installed by users of S60 devices.

Latency

From a mobile phone perspective, latency generally refers to the time that passes between when an action is requested and when it actually occurs. Examples of such are network latency and PTT latency.

kbps

A measure of bandwidth meaning 1000 bits per second. Not to be confused with kBps (upper case B), which means 1000 bytes per second.