There are many abbreviations you’ll come across when you play it. Some of the frequently found online include: 1:1 (when naturals pay even instead of 3-to-2), DAS (double after splits allowed), DC17 (dealer decides on whether to stand or hit on S-17), DX (Double Exposure), D2 (double on any first two cards), ES (Early surrender), H-17 (dealer hits on the soft 17 rule), HSA (hit after you split aces), J (when jokers are in the pack), KB (side bet called King’s Bounty is available), etc.