-Mountain Daylight Time, a time zone in the United States of America, which is 7 hours behind Coordinated Universal Time -the IATA code for Harrisburg International Airport in Pennsylvania -World of Darkness, a role-playing game -the stock exchange code for Medtronic, a commercial company, on the New York Stock Exchange -working memory -Means of Transport -Mean Down Time, which refers to the average downtime, a term used in maintenance -the Microsoft Deployment Toolkit, Microsoft's free deployment solution.