The OPTICON Infrastructure Coordination Network brings together all of Western Europe's major owners and operators of large observatories and data centres. The goals are simple: to identify opportunities where greater progress can be made in collaboration with than in competition, and to achieve those agreed goals. This task is implemented in full coordination with Radionet, the complementary ICN concerned with radio astronomy. This brochure outlines a little of the scientific context, introduces the partners and describes the agreed goals.