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 sport utility vehicle seating for four adults and an enclosed cargo area, while their similar compact truck versions that would normally fit two and have an open load bed. The first purpose-designed unibody compact SUV, and the first with four-doors, was the Jeep Cherokee (XJ). It was introduced by American Motors Corporation in 1983 for the 1984 model year and was produced almost unchanged through 2001 in the U.S., and through 2005 in China. "Automobile" magazine called it a "masterpiece" of automotive design with room for five passengers and their cargo. The compact XJ Cherokee shared its name from the full-size SJ model,