Outside South African school

[Torc]

Well, considering that Celsius is based on water boiling at 100 Degrees and Fahrenheit is based on the human body being 100 Degrees (of course later on was found that the scale was incorrectly made and the human body is actually 98.6 Degree F) it's not only plausible that they would intersect but that they would have to intersect.

The one I like is 0° K

According to the Farenheit Article on Wikipedia the top endpoint was originally calculated as 96 degrees, not 100, the relevant quote is as follows.

According to a journal article Fahrenheit wrote in 1724, he based his scale on three reference points of temperature. The zero point is determined by placing the thermometer in brine: he used a mixture of ice, water, and ammonium chloride, a salt. This is a type of frigorific mixture. The mixture automatically stabilizes its temperature at 0 °F. He then put a thermometer into the mixture and let the liquid in the thermometer descend to its lowest point. The second point is the 32 degree found by putting the thermometer in still water as ice is just forming on the surface. The third point, the 96 degree, was the level of the liquid in the thermometer when held in the mouth or under the armpit. Fahrenheit noted that, using this scale, mercury boils at around 600 degrees.

Later, work by other scientists observed that water boils about 180 degrees higher than the freezing point and decided to redefine the degree slightly to make it exactly 180 degrees higher. It is for this reason that normal body temperature is 98.6 on the revised scale (whereas it was 96 on Fahrenheit's original scale).

Nowadays with computers it should not matter what system measurements are stored in, you should be able to use a simple conversion routine to display them into any system the user wants.