Skills that are apart of the magic 14 that are considered “core” skills. If I’m not mistaken, in-game gives the breakdown of what is included. So why so much salt. The consensus would be if you saw it in game, you’d know what is included in that, to make an informed decision to purchase or not.
So after getting home and checking the game, I was correct in that if you look under character sheet, and select Expert Systems, you can see what each ES gives you in regards to skills.