These are three charts representing the three insignia styles (command, science, and engineering/services) from Star Trek: The Original Series that you can use to make whatever you want! I’ve included instructions for a pretty basic crocheted scarf, but the charts work for knitting as well.

7/1/10 - I just realized that I forgot the ‘science’ chart in the original .pdf file, so I’ve corrected and updated it. I also expanded the crochet instructions a bit, since the previous ones were awfully vague :D Apologies to anyone who tried to make the scarf without all the charts!