D2VISP stands for Digital 2 Virtual ISP Pvt. Ltd. (India)
D2U stands for Design to Users (architecture firm; Milan, Italy)
C2BMC stands for Command and Control, Battle Management, and Communications
C2BM stands for Command, Control, and Battle Management (US DoD)
C2BL stands for Command & Control Battle Lab
C2BFMA stands for Command & Control Battlefield Function Mission Area
C2B3 stands for Colonel Claypool's Bucket of Bernie Brains (band)
C2B2C stands for Consumer to Business to Consumer (e-commerce model)
C2CIF stands for Command and Control Controller Information File
ABUCM stands for American Board of Urgent Care Medicine (Orlando, FL)