completely outperformed most competitors machines, at least in theory. With peak performance of 1600 MIPS and a price $2.2 million, it was $1375/MIPS, compared to a contemporary Alliant FX/40 minicomputer at $4650/MIPS. A 1989 Computerworld review of the market for mid-range high-performance machines showed only one machine in the same class, the Connection Machine CM-2. The new leftmost-rightmost algorithm had a fatal flaw. In high-contention cases the "middle" units would never be serviced, and could stall for thousands of cycles. By 1989, it was clear this was going to need a redesign, but by this point other machines with similar price/performance ratios were coming on the market and the pressure was on to ship immediately. The first two machines were shipped to Caltech in October 1989 and the University of Colorado at Boulder in November, but there were no other immediate sales. One sample ES-1 is in storage at the Computer History Museum. Evans resigned from the E&S board in 1989, and suddenly the votes turned against continuing the project. E&S looked for a buyer who was interested in continuing the effort, but finding none they instead closed the division in January 1990. References Citations Bibliography Supercomputers Massively parallel computers