Work on Shabbat

According to Mishnah Shabbat, 7:2, there are 39 kinds of work that are forbidden on Shabbat. Sowing Plowing Reaping Binding Sheaves Threshing Willowing Selecting Grinding Sifting Kneading Baking Shearing Wool Washing Wool Beating Wool Dyeing Wool Spinning Weaving Making Two Loops Weaving Two Threads Separating Two Threads Tying Untying Sewing Two Stitches Tearing Trapping Slaughtering Flaying Salting Meat Curring Hide Scraping Hide Cutting Hide Up Writing Two Letters Erasing Two Letters Building Tearing a Building Down Extinguishing a Fire Kindling a Fire Hitting with a Hammer Taking an Object from the Private Domain to the Public, or Transporting an Object in a Public Domain