Twice a day 
Background Information Document 
Bis in die 
Buoyancy Induced Dispersion 
Block Interconnect Diagrams 
Bridge Identification Code 
Brinell Indentation Diameter 
Business Improvement District 
Bachelor of Industrial Design 
Bachelor of Interior Design 
BALB invariant delta 
Banco Interamericano de Desarrollo 
Base IDentity code 
Bcl-2 interacting domain 
Bellevue Index of Depression 
beta-interaction domain 
Billing ID Numbers 
bipolar I disorder 
bis in diem 
Bit Indicador Directo 
BlackICE Defender 
Body image dissatisfaction 
British Inter Departmental 
brought in dead 
Bugtraq IDentification 
Built-In Diagnostics 
Bulk Information Device 
Business Intelligence Division 
IATA code for Block Island State Airport… 
Medication twice a day