BS Z 9:1998, ISO 13420:1997

Network - A link and communication between things. Often computers or people.

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.

Performance - When someone is presenting a form of entertainment, also how well someone is doing within a role.

Transport - Something that carries people or goods.

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