The present invention provides a method and computer-readable medium for executing a method of placing an order for a sub-component (part) of a product, including generally three steps: displaying a diagram depicting sub-components of a product in an exploded view on a user screen; receiving a user selection of a sub-component to be ordered; and processing the selection of a sub-component to be ordered. Optionally, the method may allow the user to selectively view further information pertinent to displayed sub-components, such as their prices and specifications, or to selectively zoom in on and zoom out of the exploded view or to scroll the exploded view. The method thus assists the user when attempting to identify and/or order a sub-component for the product. The method may also be implemented in a stand-alone computer system.