Computer software (or simply software) refers to one or more computer programs and data held in the storage of a computer for some purpose. Program so ...

A computer is a device or machine for making calculations or controlling operations that are expressible in numerical or logical terms. Computers are ...

A chemical substance is any material substance used in or obtained by a process in chemistry: A chemical compound is a substance consisting of two or ...

Aerospace engineering is the branch of engineering concerning aircraft, spacecraft and related topics. It is often called aeronautical engineering, pa ...

An automobile, usually called a car (an old word for carriage) or a truck, is a wheeled vehicle that carries its own engine. Older terms include horse ...

Agriculture is the process of producing food, feed, fiber and other desired products by cultivation of certain plants and the raising of domesticated ...

In military science, defense (or defence) is the art of preventing an enemy from conquering territory; usually via fortifications. Defense may also be ...

Marketing is the craft of linking the producers (or potential producers) of a product or service with customers, both existing and potential. Some for ...