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
Compact Space (band) Compact Space (band) Compact Space is a band featuring Christian Eigner, Daryl Bamonte and vocalist Florian Kraemmer. They started writing together in 2008 and released their first album in 2011. The first single 'Push Push' was released on iTunes and Amazon in October 2009 through their own label Elsbeere Recordings, to great acclaim. On the internet, they also placed two other songs "Reverse Happiness" and "My Other Life" for people to stream on their MySpace page. The album and single were produced by Christian Eigner and mixed by Paul PDub Walton. The artwork for the single is by Roger O'Donnell.