Your guide to the 2013 Nobel prizes

STOCKHOLM (AP) Here's a look at the achievements honored by this year's Nobel prizes, the $1.2 million awards handed out since 1901 by committees in Stockholm and Oslo:

NOBEL PEACE PRIZE

The Organization for the Prohibition of Chemical Weapons, the investigation and enforcement arm for a 1997 treaty banning the use of chemical weapons. Based in The Hague, Netherlands, the global chemical weapons watchdog deploys teams worldwide to identify whether all 190 nations that have signed the treaty are disclosing all chemical weapons stocks and, if possessing them, destroying both the weapons and their manufacturing sites. An OPCW mission is currently planning the destruction of chemical weapons stockpiles and facilities in Syria, the most recent nation to accept the arms-control accord.

NOBEL PRIZE IN LITERATURE

Canadian author Alice Munro, hailed by the award-giving Swedish Academy as a "master of the contemporary short story." The 82-year-old writer is often called "Canada's Chekhov" for her astute, unflinching and compassionate depiction of seemingly unremarkable lives. She produced several story collections chronicling the lives of girls and women before and after the 1960s social revolution, including "The Moons of Jupiter," ''The Progress of Love" and "Runaway."

NOBEL PRIZE IN CHEMISTRY

Three U.S.-based scientists for developing computer models that can predict chemical reactions for use in creating new drugs and other tasks. Their approach combined classical physics and quantum physics. The winners are Martin Karplus of the University of Strasbourg, France, and Harvard University; Michael Levitt of the Stanford University School of Medicine, and Arieh Warshel of the University of Southern California in Los Angeles.

NOBEL PRIZE IN PHYSICS

Peter Higgs of Britain and Francois Englert of Belgium for their 1964 theory, advanced independently of each other, about how subatomic particles get their mass. Their theory made headlines last year when the CERN laboratory in Geneva confirmed it by discovering the so-called Higgs particle.

NOBEL PRIZE IN MEDICINE

Three U.S.-based researchers for their breakthroughs in understanding how key substances move within a cell. They developed better understanding of vesicles, tiny bubbles that deliver their cargo within a cell to the right place at the right time. Disturbances in that delivery system can lead to neurological diseases, diabetes or immunological disorders. The prize was shared by Americans James E. Rothman of Yale University and Randy W. Schekman of the University of California at Berkeley; and German-American Dr. Thomas C. Sudhof of the Stanford University School of Medicine.

WHAT'S NEXT?

This year's Nobel season ends with the economics award Monday.