Casio (1s, 10s, 100s, etc ... ) had nine keys. Another distinguishing innovation was the use of a single display window instead of the three display windows (one for each argument and one for the answer) used in other calculators. Casio Computer Co., Ltd. was formed in June 1957. That year, Casio released the Model 14-A, sold for 485,000 yen, the world's first all-electric compact calculator, which was based on relay technology. In the 1980s, its budget electronic instruments and its line of affordable home electronic musical keyboard instruments became popular. The company also became well known for the wide variety
QAMA Calculator 2016. QAMA Calculator The QAMA Calculator is a calculator that requires users to provide a reasonable estimate of the answer before the precise answer is delivered. QAMA stands for Quick Approximate Mental Arithmetic. Invented by Ilan Samson, it aims to get users to think first by estimating before they get the correct answer. Estimation is seen by many as an essential part of mathematics, and some believe that the presence and popularity of calculators could inhibit the use of estimation skills. A physical version of the calculator was released for sale in 2014, with apps for smartphones and tablets developed