Calculator This led the way to the first credit-card-sized calculators, such as the Casio "Mini Card LC-78" of 1978, which could run for months of normal use on button cells. There were also improvements to the electronics inside the calculators. All of the logic functions of a calculator had been squeezed into the first "calculator on a chip" integrated circuits (ICs) in 1971, but this was leading edge technology of the time and yields were low and costs were high. Many calculators continued to use two or more ICs, especially the scientific and the programmable ones, into the late 1970s. The
Yamaha electric guitar models Yamaha electric guitar models The is a multinational corporation and conglomerate based in Japan with a wide range of products and services, predominantly musical instruments, motorcycles, power sports equipment and electronics. Yamaha, a company that is known for having an extensive broad range of products, from motorcycles to musical instruments, produces electric guitars models since 60's. It follows a compilation of these products. In 1967, Yamaha have changed the series # from S to SG series. Yamaha began using the "SG" (solid guitar) prefix for their solid bodied guitars when they introduced their first solid-body model in 1966 and continued