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
Digital Compact Cassette and Compact Disc) while Philips decided on a tape format that was compatible with their earlier analog Compact Cassette format. DCC, initially referred to as S-DAT (stationary-head digital audio tape, as opposed to R-DAT—rotary-head digital audio tape), was developed in cooperation with Matsushita, and the first DCC recorders, were introduced at the CES in Chicago in May, 1992 and the consumer electronics show in Amsterdam in September 1992. At that time, not only Philips and Technics (brand of Matsushita) announced DCC recorders but also other brands such as Grundig and Marantz (both related to Philips at the time). More recorders