Main Page | See live article | Alphabetical index Curta made a small, hand-cranked mechanical calculator for use by contestants in sports car rallies during the 1960s, '70s and into the '80s. After the introduction of the electronic calculator for other purposes, these were used primarily in time-speed-distance (TSD) rallies to aid in computation of times to checkpoints, distances off-course, etc. Contestants who used such calculators were often called "Curta-crankers" by those who were limited to paper and pencil, or who utilized computers linked to the car's wheels. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.