for questions about creating a tray icon for a software application, customising the behaviour of a tray icon, and adding application control or monitoring to a tray icon. For questions which relate the system notification area or system tray in general, use the notification-area or system-tray tag instead.

WebMail is short form of Web Based Email Service. In common All E-Mail Services on Present scenario are WebMail and support other Desktop and Mobile Client Also.

The aspect of an object which describes it as unaltered since a reference time at which a description of its state was recorded, or a description of the continued functioning of a property of the object. An example of this is checking whether the MD5 hash of this file is the same as the MD5 hash that was calculated yesterday, to ensure the file was unaltered.

Refers to anything whose length can vary

S/MIME (Secure/Multipurpose Internet Mail Extensions) is a standard for public key encryption and signing of MIME data.

ESS (Emacs Speaks Statistics) is an emacs add-on for editing scripts and interacting with statistical programs such as R, Stata or SAS.

IFS is a variable in Unix shells (Bourne, POSIX sh, bash, ksh, …) that controls how unescaped substitutions are split into words.

The Collatz Conjecture is a conjecture that a certain algorithm always terminates. The algorithm is stated as follows: starting with some positive integer n, divide n by two if it is even and otherwise triple n and add one. The algorithm terminates when n reaches one. It is currently an open problem whether this terminates for all positive integers. It is also called the Hailstone Sequence.