Calculator to the development of electronic calculators. The Casio Computer Company, in Japan, released the Model "14-A" calculator in 1957, which was the world's first all-electric (relatively) compact calculator. It did not use electronic logic but was based on relay technology, and was built into a desk. In October 1961, the world's first "all-electronic desktop" calculator, the British Bell Punch/Sumlock Comptometer ANITA (A New Inspiration To Arithmetic/Accounting) was announced. This machine used vacuum tubes, cold-cathode tubes and Dekatrons in its circuits, with 12 cold-cathode "Nixie" tubes for its display. Two models were displayed, the Mk VII for continental Europe and the
Yamaha electric guitar models position). The controls were a five position pickup selector and master volume and master tone controls. The bridge was a TRS-Pro locking tremolo. All hardware was gold plated. Finish options were Antique Sunburst, Black Burst, Faded Blue and Violet Burst. YAMAHA began making the RGX 121 S in 2003 The RGX 420 S was introduced in 2003. The Yamaha RGX 420 is an electric guitar that, so far, has been released two times in versions "S" and "dz", featuring different paint-finishes but all the same mechanics and electronics. YAMAHA manufactured the RGX 420 SD6 (Drop 6) between 2001 and 2003