1. The three primary elements of knitting are the needle, cam, and sinker.
2. The needle is the main knitting tool that rises and receives new loops. There are three types of needles.
3. The cam is a mechanical device that converts rotary motion into reciprocating motion for the needles. There are engineering cams and knitting cams which include knit, tuck, and miss cams.
4. The sinker is a thin metal plate that acts between needles to form, hold down, and knock over loops.