Where I live, a graduate with an MBBS degree (Master of Medicine, Master of Surgery) is called a doctor. To me, strictly speaking, he is a doctor only...
In computer networking, a virtual storage area network (VSAN) is a collection of ports from a set of connected Fibre Channel switches, that form a virtual fabric. Ports within a single switch can be partitioned into multiple VSANs, despite sharing hardware resources.
A ventricular septal defect (VSD) is a hole between the two pumping chambers of the heart. The result of such a hole is that some of the blood returning from the lungs, which should be pumped to the body, is instead pumped back to the lungs.