B3, B03, B.III or B-3 may refer to.
A third baseman, abbreviated 3B, is the player in baseball whose responsibility is to defend the area nearest to third base — the third of four bases a baserunner must touch in succession to score a run.
"The Three Bs" is an English-language phrase derived from an expression coined by Peter Cornelius in 1854, which added Hector Berlioz as the third B to occupy the heights already occupied by Johann Sebastian Bach and Ludwig van Beethoven.
In baseball, a triple is the act of a batter safely reaching third base after hitting the ball, with neither the benefit of a fielder's misplay (see error) nor another runner being put out on a fielder's choice.
is the idol training department of the third section of the entertainment company Stardust Promotion.
, often stylized "3B LAB.☆", "3B Lab.Star", or "3B Lab.s", is a Japanese punk rock group.
The 3B series computers were a line of micro-programmable minicomputers produced by AT&T Computer Systems' Western Electric subsidiary.