The O - U seems to have the best explanation so far - We'll use that as our syllabus

Bring our prior text - Exodus - Page 112 footnote 10

Taking medicine on Shabbos
http://www.star-k.org/kashrus/kk-medi-guide.htm

Wikipedia

They found 39 categories of forbidden acts, all of which are types of work that were needed to build the sanctuary:

1. Sowing
2. Plowing
3. Reaping
4. Binding sheaves
5. Threshing
6. Winnowing
7. Selecting
8. Grinding
9. Sifting
10. Kneading
11. Baking
12. Shearing wool
13. Washing wool
14. Beating wool
15. Dyeing wool
16. Spinning
17. Weaving
18. Making two loops
19. Weaving two threads
20. Separating two threads
21. Tying
22. Untying
23. Sewing two stitches
24. Tearing
25. Trapping
26. Slaughtering
27. Flaying
28. Salting meat
29. Curing hide
30. Scraping hide
31. Cutting hide up
32. Writing two letters
33. Erasing two letters
34. Building
35. Tearing a building down
36. Extinguishing a fire
37. Kindling a fire
38. Hitting with a hammer
39. Taking an object from the private domain to the public, or transporting an object in the public domain.

http://www.jewfaq.org/shabbat.htm

Wikipedia