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
The Electric Company June Angela. Due to the overwhelming—and somewhat unexpected—popularity of the initial DVD release, a second boxed set was released on November 14, 2006 ("The Best of the Electric Company: Volume 2"). This second volume contained 20 episodes from seasons one through five plus a 30-minute documentary on the effects of in-school viewings of "The Electric Company" from 1975. Cast members Luis Ávalos, Jim Boyd, Judy Graubart, Skip Hinnant, and Hattie Winston provided commentary and reflected on their years on the show. However, the original content of nine episodes presented in this set were altered. In some cases, material that was