Programmable calculator to use magnetic strips were the HP-41C and TI-59. Continuous memory does not lose its content when the calculator is switched off. With continuous memory the user can, for example, change batteries without losing the entered programs. Compact Cassettes offered a simple, inexpensive alternative to magnetic cards. Usually, an interface module, such as the Casio FA-1, was used to connect the calculator to an ordinary cassette recorder and digital data were encoded as frequency-shift keyed audio signals. Sharp and Hewlett-Packard also sold dedicated micro- or mini-cassette recorders that connected directly to the calculator. These set-ups, while being more practical and
Rogers Vacuum Tube Company founded Toronto radio station CFRB in order to promote its invention of a batteryless radio receiver as well as demonstrate his invention of a radio transmitter using batteryless alternating current tubes making CFRB the first all-electric radio station in the world. Rogers Sr. died in 1939 and the company was sold in 1941 to Small Electric Motors Ltd., (which soon became the Canadian division of Dutch giant Royal Philips Electronics) which changed the name of the Rogers Majestic Corporation Limited to Standard Radio Ltd... In 1924 Edward S. Rogers Sr formed Rogers Radio Ltd of Toronto to manufacture radios. While