The IBM 704 is a large digital mainframe computer introduced by IBM in 1954. It was the first mass-produced computer with hardware for floating-point arithmetic. The IBM 704 Manual of operation states: The type 704 Electronic Data-Processing Machine is a large-scale, high-speed electronic calculator controlled by an internally stored program of the single address type. The 704 at that time was thus regarded as "pretty much the only computer that could handle complex math". The 704 was a significant improvement over the earlier IBM 701 in terms of architecture and implementation. Like the 701, the 704 uses vacuum-tube logic circuitry, but increased the instruction size from 18-bit to 36-bit, the same as the memory's word size. Changes from the 701 include the use of magnetic-core memory instead of Williams tubes, floating-point arithmetic instructions, 15-bit addressing and the addition of three index registers. To support these new features, the instructions were expanded to use the full 36-bit word. The new instruction set, which is not compatible with the 701, became the base for the "scientific architecture" subclass of the IBM 700/7000 series computers. The 704 can execute up to 12,000 floating-point additions per second. IBM produced 123 type 704 systems between 1955 and 1960. Landmarks The programming languages FORTRAN and LISP were first developed for the 704, as was the SAP assembler—Symbolic Assembly Program, later distributed by SHARE as SHARE Assembly Program. MUSIC, the first computer music program, was developed on the IBM 704 by Max Mathews. In 1962, physicist John Larry Kelly, Jr. created one of the most famous moments in the history of Bell Labs by using an IBM 704 computer to synthesize speech. Kelly's voice recorder synthesizer vocoder recreated the song Daisy Bell, with musical accompaniment from Max Mathews. Arthur C. Clarke was coincidentally visiting friend and colleague John Pierce at the Bell Labs Murray Hill facility at the time of this speech synthesis demonstration, and Clarke was so impressed that six years later he used it in the climactic scene of his novel and screenplay for 2001: A Space Odyssey, where the HAL 9000 computer sings the same song. (Bell Laboratories later released a recording, on ten inch 78-RPM records, of speech and music created this way. It was apparently made with an IBM 7090, the solid state successor to the 704.) Edward O. Thorp, a math instructor at MIT, used the IBM 704 as a research