HRS

acronym: Hazard Ranking System (EPA)
Found on http://cdiac.ornl.gov/pns/acronyms.html#H

HRS

Health and Retirement Study, a longitudinal panel of older Americans studied by the Survey Research Center at the University of Michigan. Their Web site is at http://www.umich.edu/~hrswww. Contexts: labor
Found on http://www.econterms.com/glossary.cgi?query=HRS

hrs

hours
Found on http://www.noslang.com/dictionary/h/

Hrs

Hours, details ...
Found on http://www.cryer.co.uk/glossary/h/index.htm
No exact match found