Different from Irish or Gaelic Handball, Olympic handball is a team sport where a ball is thrown into the goal of the other team.
The team with the most goals after two periods of 30 minutes wins. Modern handball is usually played indoors, but outdoor variants exist in the forms of field handball and Czech handball (which were more common in the past) and beach handball (also called sandball).
American handball and Gaelic handball are completely different sports not related toTeam handball.
The handball playing field is similar to an indoor soccer field. Two teams of seven players (six field players plus one goalkeeper) take the field and attempt to score points by putting the game ball into the opposing team’s goal.
The official rules of the EHF (European Handball Federation) and the IHF (International Handball Federation) can be downloaded below.
The official Summer Olympics website is a great place to learn more about Handball.