PD CLC/TR 62453-41:2009

Computer - A programmable electronic machine which stores and manipulates data.

Equipment - A product or good that is tactile.

Specification - A description of a product with the details of its attributes.

Layer - Adding extra quantities of materials for extra practical benefits, e.g. warmth.

Model - A representation of a person or thing, usually smaller scale. It can also be a person that wears clothing.

The British Standards Institution are a non profit making organisation, who produce standards and standard related services, for a variety of industries. The standards that they produce are used as a guideline or definition of the minimum levels certain services and product should reach. The standards are produced by BSI directly, following consultations and public enquiries. At shop.bsigroup.com, you can purchase a variety of standards. They stock documents for industries such as food and drink, engineering, building and construction, energy and utilities, transport and agriculture and farming. If you become a member of their site you can get huge discounts on their standards. They also offer training courses and conferences via their website, or you could take advantage of their online standards tools.