XBA

XBA stands for:

Cross Battery Assessment, the procedure for systematically combining different psychological test procedures
Extra Basehits Allowed, a statistic from baseball
ISO 4217 code for Bond Markets Units European Composite Unit (EURCO)
Xtreme Bandwidth Architecture, a system architecture for 3D graphics chips from Bitboys
African Development Bank , nationalities ranked 11-13 in the second row of Machine Readable Travel Documents

xba stands for