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
Willapa Electric Company Willapa Electric Company The Willapa Electric Company was an electric railway and electric utility company incorporated on August 2, 1913, as successor to the Willapa Harbor Railway, a electric street railway extending from Raymond to South Bend, Washington, in addition to other public utilities in the area: Twin City Electric Company and South Bend Electric Company. The company was to be capitalized at $400,000. The organizers were J S Thornton, R L Fisher and M M Fisher. The company was controlled by the Cities Service Power and Light Company. Rail operations continued until July 1930. In 1939, the company sold