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.