HLA

The initialism HLA can stand for:

Hapag-Lloyd Airlines, a German charter airline
Harvey L. Atwater, a U.S. politician
Henry Louis Aaron, a baseball player
High Level Architecture, a distributed computer simulation standard
High Level Assembly, an Intel 80x86 Assembly Language, originally written as a teaching aide by Randall Hyde
High-level assembler, a generic term for assembly language translators that incorporate features found in modern high-level programming languages into an assembler.
House of Lords Act, a UK constitutional reform
Human leukocyte antigen, a key part of the human immune system, or the paternity test based upon it
Human Life Amendment, a proposed constitutional prohibition of abortion in the United States
Hidden Lake Academy, a boarding school