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
Transitron Electronic Corporation each. The first week closed at $43 per share. After going out of business, David Bakalar devoted his time to sculpture; see "Renaissance". Transitron Electronic Corporation Transitron Electronic Corporation was a semiconductor device fabrication company of the United States. It was founded by Leo and David Bakalar incorporated in Wakefield, Massachusetts, in 1952. David Bakalar was the president from 1952 to 1984. In 1986 the company went out of business, failing to keep pace with the rapid advances in technology. The company was established at the time of the economic boom in Massachusetts. Its first successful product was the gold