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
Space Age Electronics Space Age Electronics Space Age Electronics (SAE) is a manufacturing company specializing in fire protection equipment and accessories, located in Sterling, Massachusetts. Founded in 1963, the company is known for its fire alarm notification appliances. In 1970, Space Age Electronics introduced the first visual notification appliances, the AV32 and the AV34 light plate. They used relabeled Federal Vibratone 450D's for their series of 2DCD horns, which were often used with the AV32 or 34.Other popular horns used would be Wheelock 34T-24's, Wheelock 34's or speakers. These would also be used with horns made by other companies, generally Wheelock, Federal Signal,