plt

PLT is an acronym that can refer to several distinct concepts across different domains. This article discusses two widely used meanings—medicine and computing—and notes that other uses exist depending on context.

In medicine, PLT most commonly denotes platelet count in blood tests. Platelets, or thrombocytes, are small cell fragments that participate in blood clotting. In complete blood count results, PLT is reported as the number of platelets per liter, usually expressed in units of x10^9/L. Reference ranges commonly fall between about 150 and 450 x10^9/L, though values vary by laboratory. Abnormal PLT levels can indicate conditions such as thrombocytopenia (low platelets) or thrombocytosis (high platelets) and may prompt further testing.

In computing, PLT Scheme refers to a dialect of the Scheme programming language developed by the PLT group at Rice University. PLT stands for Programming Languages Theory, the research group behind the project. The language was influential in education and language design and was later renamed Racket in 2010, continuing as a platform for teaching, research, and experimentation.

In other contexts, PLT appears as an acronym for various organizations, products, or terms specific to a field. The intended meaning is usually inferred from surrounding information.