 Ovid has its global headquarters in New York City.Ovid was founded in 1984 by Mark Nelson, who had developed an interface to MEDLINE, the world's largest and oldest medical database, produced by the US National Library of Medicine.The company at that time was known as Online Research Systems, a name Nelson chose to disguise the fact that he was the only employee of the company, operating out of an apartment in Spanish Harlem, New York City.