SBC stands for "Southern Baptist Convention," and you could make the argument that the SBC is: 1) Arminian, 2) Calvinist, 3) Neither and 4) Both.
In my estimation, when considering the John 3:16 Conference, apologetics books, recent activity within the SBC and the general consensus of SBC Presidents, it appears that a fair case can be made that the SBC leans most closely towards being functionally an "OSAS Arminian" denomination, even though the label itself is officially rejected. I tend not to get into the history of the Southern Baptist movement, because that is not really relevant to the question of whether the SBC is presently a Calvinist or Arminian denomination. The SBC Church that I presently attend is First Baptist Church Downtown Jacksonville, pastored by Mac Brunson, who espouses a theological perspective very closely resembling that of Jerry Vines, who sponsored the John 3:16 Conference. As a member of the Society of Evangelical Arminians, I may be biased in my outlook, but this is my perspective, for what it's worth.
Refer to Roger Olson's article as well.