HRL

HRL may refer to:

• HRL (software), an artificial intelligence program named for mathematicians Hardy, Ramanujan and Lakatos
• HRL, a Rockwell scale of materials' hardness
• HRL Laboratories, formerly Hughes Research Laboratories, in Malibu, California, United States
• Harlech railway station, in Wales
• Hilandar Research Library of medieval Slavic manuscripts, at Ohio State University, United States
• IBM Haifa Research Laboratory, in Haifa, Israel
• Valley International Airport (IATA airport code), serving Harlingen, Texas, United States

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