Retriever Sports, on the Mill Street Ind Est near Slough railway station, is the world's largest manufacturer of darts equipment. Mars Limited has a large chocolate factory, run under the name of Effem Holdings Ltd, also in Slough on the enormous Slough Trading Estate which makes 3m Mars bars a day; nearby is Johnson Controls UK (car seats), and ICI Paints, Polyfilla, and Dulux. Horlicks is made by GSK there.