Knitting Computer

All knitters are mathematicians. Knitters count the stitches (arithmetic), figure out the number of stitches needed (algebra) and create shapes (topology, geometry, and trigonometry). Knitting was one of the first applications of computer programming. Knitted fabrics were commercially produced using punch cards long before anyone ever heard of IBM or Microsoft.

I've gone looking for knitting calculators on-line before, but it's usually something you have to pay through the nose for. Finally, an on-line calculator that's free! Yea! Of course, it's only for one style of sweater, and they sell a more sophisticated model on another page, but hey, I'll take it.