A feature (sometimes referred to as a "Function") is a specific capability of a product or service that usually relates to providing the user with an ability to perform all or part of a task. Software in particular often uses this concept, and the list of features for a particular software application are often listed somewhere. Additional features are often added to future iterations or versions of a product or service in order to enhance e or improve it, and customers are sometimes surveyed or otherwise asked about "feature requests" which are descriptions of additional features that they would like to have included in future upgrades to the product or service.