You will see those tables /BIC/ and /BI0/ mainly in SAP BI/BW system. The tables are maintained as per SAP standard namespace for developing BI objects. This is also to avoid naming conflicts between customer objects.
/BIC/ Table
• SAP namespace delivered objects
• Objects begin with 0
/BI0/ Table
• Customer created objects
• Objects begin with A – Z
wrong? it is the opposite