VLOOKUP is a Spreadsheet function for retrieving a value from an array using a vertical lookup value and a positive column offset. Use with [excel-formula] or [google-sheets-formula] or any other product that supports such lookup

Flex 4 is an Apache (previously Adobe) Framework used to build RIA for Flash Player.

PL/pgSQL is the default procedural language for PostgreSQL. Questions about PL/pgSQL should probably be tagged [PostgreSQL] as well.

The selection can refer to text that has been highlighted, or it can refer to a choice made in UI elements that require one, e.g. a particular option in an HTML `select`. Selection is also the stage of a genetic algorithm in which individual genomes are chosen from a population for later breeding.

NaN is an abbreviation for "Not a Number". NaN is sometimes not equal to itself.

z-index represents the order on the z-plane in which an element appears. An element with higher stack order is always in front of another element with lower stack order. It is available in most of the GUI frameworks (both Web and Desktop).

A heat map is a graphical representation of data where the individual values contained in a matrix are represented as colors.

Exchange Web Services (EWS) is an extensibility point for clients that connect to the Exchange server and consume information about user availability, and the manipulation of items that are located in the Exchange data store.

Software or hardware device designed to play audio/video files.

Subset of the OpenGL 3D graphics API designed for embedded devices such as mobile phones. This version 2.0 eliminates most of the fixed-function rendering pipeline in favor of a programmable one.