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
Electric Telegraph Company Electric Telegraph Company The Electric Telegraph Company was the world's first public telegraph company, founded in the United Kingdom in 1846 by Sir William Fothergill Cooke and John Lewis Ricardo, MP for Stoke-on-Trent. At creation the company purchased all the patents Cooke and Wheatstone had obtained to date. It merged with the International Telegraph Company in 1855 to become the Electric and International Telegraph Company. C.F. Varley was chief engineer in the 1860s. The company was nationalised by the British government in 1870 and BT, the giant multi-national communications corporation based in over 170 countries worldwide today, is a direct