Code completion

Intellisense;trade is a feature introduced and popularized by Microsoft Visual Studio. It involves a form of autocomplete for variable names based on a prefix and a convenient way to access description of member functions of a class, particularly their parameter lists. So it provides both an improved form of keyboard input and a fast, convient manner to access relevant documentation information about the source code or about the external libraries being used.

Originating with Microsoft, the idea has been widely replicated in many other source code editors.