The Culture's largest vessels - apart from certain art-works and a few Eccentrics - are the General Systems Vehicles of the Contact section. (Contact is the part of the Culture concerned with discovering, cataloguing, investigating, evaluating and - if thought prudent - interacting with other civilisations; its rationale and activities are covered elsewhere, in the stories.) The GSVs are fast and very large craft, measured in kilometres and inhabited by millions of people and machines. The idea behind them is that they represent the Culture, fully. All that the Culture knows, each GSV knows; anything that can be done anywhere in the Culture can be done within or by any GSV. In terms of both information and technology, they represent a last resort, and act like holographic fragments of the Culture itself, the whole contained within each part.
- A Few Notes On The Culture