The Government-sponsored "Recycle Now" initiative has defined loads of signs to identify locations where all sorts of materials can be lodged for recycling. Their website is here, and the symbols are available for download here (you may have to register). Their focus is on the recycling of consumer or after-market scrap. These symbols are intended to show recyclability of a product and other environmental care information. As always, tell us if you think there is another symbol we should include here.