Business clusters:

'geographic concentrations of interconnected companies, specialised suppliers, service providers, firms in related industries, and associated institutions (for example, universities, standards agencies, and trade associations) in particular fields that compete but also co-operate'

(Porter 1990 - The Competitive Advantage of Nations)

A series of business clusters are combined to form the content on the business cluster line - aiming to foster greater co-operations through the wider sharing of information.