.md is the Internet country code top-level domain (ccTLD) for Moldova.
As in the US the initials "MD" are usually given after the name of a Doctor of Medicine, the .md top-level domain was once heavily marketed toward people in the medical profession at a premium price. As of 2012 it is marketed toward the general public for $150.00 per year and there are approximately 20,000 .md registrations.