MSD

MSD may refer to:

* Material Support Division, a division of the Air Force Supply Management arm, with some operations at Warner-Robins ALC
* Musculoskeletal disorders
* Macromolecular Structure Database, one of the services provided by the European Bioinformatics Institute
* Molecular Structures Database
* Modem Sharing Device
* Moscow Summer Time
* Merck Sharp and Dohme, aka Merck & Co., the U.S. and Canada pharmaceutical company spun off from the German Merck KGaA
* Mean Shortest Distance, in the context of the PGP Web of trust
* Microsoft Diagnostics, computer diagnostic program shipped with various versions of DOS and Microsoft Windows operating systems
* Mission Science Division, a group of scientists, research fellows and young graduates working at the European Space Agency
* Master of Science in Dentistry
* Mobile Security Division, an elite, tactical response unit of the US State Department's Bureau of Diplomatic Security
* Marine Sanitation Device
* MSD Capital LP, Michael Dell's venture capital firm
* Multiple Spark Discharge, a device used most commonly in four-stroke engines to fire multiple sparks instead of one to ensure complete burn
* Metropolitan Sewerage District, created in 1889 to manage the sewage system in the Boston area
* Metropolitan School District, used in the names of many school districts
* USB mass storage device
* Management Systems Designers, an employee-owned government contractor
* Musica Silentis Deloris, the rock band
* Master Stardust, a Zen name
* Moorside railway station, England; National Rail station code MSD.
* New Zealand Ministry of Social Development, a government agency
* Mahendra Singh Dhoni, An Indian Cricket Player
* Master SCUBA Diver, a certification level in recreational Scuba diving× Memory Stick Duo, a type of solid digital data storage device.Usually made by SONY.