Reference
Two partnership systems, side by side. Pick one to read the opening bids, responses and conventions.
System
15-17 NT, 5-card majors, three weak twos. Four-suit transfers, Roman Key Card 1430, standard pre-empts.
12-14 NT, 4-card majors, weak twos in the majors, Multi 2♦, and a 2♣ game force.