System         Standard American Yellow Card
NT             1N:15-7  2N:20-1  3N:25-7  JXF!  2S forces 3C!  3C/3D inv!
Majors         5cm, J2N!, DR = limit (pre-empt over X)
Minors         1D shows 4/4432, DR=limit, 1N/1m:6-10, 2N/1m:13-5, 3N/1m:16-7
Strong         2C shows 22+ balanced or 9+ tricks, 2D artificial, may be wtng
Weak           2D, 2H, 2S shows 5-11 hcp, good 6 cards, RONF, 2N reqs feature
Overcalls      8-16 HCP, cue is 1R force, jump overcall is pre-emptive
NT-Over        1N:15-8, 2C Stayman!, other systems off, Unu 2N = Lower 2 unbid
Doubles        Negative -> 2S!
VS.Doubles     New Suit Force 1-level, 2N = Limit raise or better!
Preempts       may be light
Vs.Preempts    Dbl is takeout at 2 and 3 level, 2N/weak 2 = 16-9 HCP Bal
Cuebids        Michaels (5-5), or natural if opp's have bid 2 suits
Slam-Bids      BLK, GSF, DOPI, Gerber over 1N, 2N openings, resps and rebids
Suit-leads     4th best, Kqx Qjx Jtx T9x kJtx kT9x qT9x xxX xxxX xxxXx aKx
NT-leads       4th best, aKjx aQjx aJt9 aT98 Kqjx kQt9 kJt9 kT98 Qjtx qT98
               Jt9x T98x xxX xxxX xxxXx
Carding        high discard encourages, low discourages, infreq count signals

s, low discourages, infreq count signals