Diagnostic and Statistical Manual (of mental disorders). It's a US acronym and I am only aware of it because the medicalization and farmacoization of life is a hot-button issue in a sector of the American radical left some of whose online publications I used to read regularly.

By the way, I was once researching the definitions of some personality disorders online, and it seems like there are different definitions of the same disorders (in the sense of slightly different diagnostic guidelines) between the US and Europe (WHO?). It is very possible, although I have no evidence of this, that there are also differences in treatment.

A society committed to the notion that government is always bad will have bad government. And it doesn't have to be that way. — Paul Krugman