Although the name of this topology for lattices is new, the Zariski topology has appeared, usually unnamed and implicitly, in a variety of guises and formulations in lattice theory over the years. Recently, under different formulations, it was used effectively by R. Ball in [3] and by H. Bunch in [7]. Out context for studying intrinsic topologies on distributive lattices was set by Frink in [9] where he stated, Many mathematical systems are at the same time lattices and topological spaces. It is natural to inquire whether the topology in such systems in definable in terms of the order relation alone. Seeking systems which are at the same time lattices and topological spaces, one must begin with i2, the real line with its usual topology and order, along with two of its substuctures I, the closed unit interval of i2, and 2, the chain consisting of the numbers 0 and 1, and then go on to form all finite and infinite Cartesian products of such systems using the product order and the Tychonoff topology. Given this collection of mathematical systems, is it possible to find one intrinsic topology-really, topology definition scheme-which will define the topology exclusively from the order? For R, 1,2 and any chain, the interval topology gives the correct Received by the editor on October 24, 1983, and in revised form on August 29, 1985. Copyright ©1987 Rocky Mountain Mathematics Consortium