Merck Pharmaceuticals

This major pharmaceutical company had an unusual identity problem. While it markets its products worldwide, it cannot use the Merck name in much of Europe because of a name conflict. A bold symbol was developed to go with the Merck name in the U.S., and with other names, such as MSD in Europe, in a common, clearly identifiable format.

source: https://www.cghnyc.com/work/project/merck