Boxing
Fighting with fists for sport is probably as old as sport itself. Boxing contests are found throughtout antiquity. The word 'boxing' came into use in England in the 18th century to distinguish fighting under agreed rules for sport. In boxing two contestants wearing padded gloves face each other in a 'ring' and fight an agreed number of rounds under recognized rules. Amateur and professional level have operated in parallel since the latter part of the 19th century. The amateur governing body, the Association International de Boxe Amateur, was founded in 1946. There are 4 major bodies in men's pro boxing: WBA, WBC, IBF and WBO.

Men: WBC World Championship:
Strawweight Light Flyweight Flyweight Super Flyweight Bantamweight Super Bantamweight Featherweight Super Featherweight Lightweight Super Lightweight Welterweight Super Welterweight Middleweight Super Middleweight Light Heavyweight Cruiserweight Heavyweight

Men: WBA World Championship:
Strawweight Light Flyweight Flyweight Super Flyweight Bantamweight Super Bantamweight Featherweight Super Featherweight Lightweight Super Lightweight Welterweight Super Welterweight Middleweight Super Middleweight Light Heavyweight Cruiserweight Heavyweight

Men: IBF World Championship:
Strawweight Light Flyweight Flyweight Super Flyweight Bantamweight Super Bantamweight Featherweight Super Featherweight Lightweight Super Lightweight Welterweight Super Welterweight Middleweight Super Middleweight Light Heavyweight Cruiserweight Heavyweight

Men: WBO World Championship:
Strawweight Light Flyweight Flyweight Super Flyweight Bantamweight Super Bantamweight Featherweight Super Featherweight Lightweight Super Lightweight Welterweight Super Welterweight Middleweight Super Middleweight Light Heavyweight Cruiserweight Heavyweight

Men: IBO World Championship:
Strawweight Light Flyweight Flyweight Super Flyweight Bantamweight Super Bantamweight Featherweight Super Featherweight Lightweight Super Lightweight Welterweight Super Welterweight Middleweight Super Middleweight Light Heavyweight Cruiserweight Heavyweight

Men: Olympic Games:
-48 kg -51 kg -54 kg -57 kg -60 kg -64 kg -69 kg -75 kg -81 kg -91 kg +91 kg
Defunct Categories: -47.5 kg -52 kg -52.5 kg -53.5 kg -56.5 kg -57 kg -58 kg -61 kg -62 kg -63.5 kg -66 kg -66.5 kg -67 kg -71 kg -71.5 kg -72.5 kg -73 kg -79.5 kg -80 kg +71.5 kg +79.5 kg +80 kg +81 kg

Amateur World Championships:
Men: -48 kg -51 kg -54 kg -57 kg -60 kg -64 kg -69 kg -75 kg -81 kg -91 kg +91 kg
Women: -46 kg -48 kg -50 kg -52 kg -54 kg -57 kg -60 kg -63 kg -66 kg -70 kg -75 kg -80 kg -86 kg
Defunct Categories: Men: -63.5 kg -67 kg -71 kg +81 kg Women: -45 kg -51 kg -63.5 kg -67 kg -71 kg -81 kg -90 kg

Amateur European Championships:
Men: -48 kg -51 kg -54 kg -57 kg -60 kg -64 kg -69 kg -75 kg -81 kg -91 kg +91 kg
Women: -46 kg -48 kg -50 kg -52 kg -54 kg -57 kg -60 kg -63 kg -66 kg -70 kg -75 kg -80 kg -86 kg
Defunct Categories: Men: -57 kg -58 kg -61 kg -62 kg -63.5 kg -67 kg -71 kg -73 kg -79.5 kg -80 kg +79.5 kg +80 kg +81 kg Women: -45 kg -51 kg -63.5 kg -67 kg -71 kg -91 kg

Men: Pan American Games:
-48 kg -51 kg -54 kg -57 kg -60 kg -64 kg -69 kg -75 kg -81 kg -91 kg +91 kg
Defunct Categories: Men: -63.5 kg -67 kg -71 kg +81 kg

Men: All Africa Games:
-48 kg -51 kg -54 kg -57 kg -60 kg -64 kg -69 kg -75 kg -81 kg -91 kg +91 kg
Defunct Categories: Men: -63.5 kg -67 kg -71 kg +81 kg

Men: Asian Games:
-48 kg -51 kg -54 kg -57 kg -60 kg -64 kg -69 kg -75 kg -81 kg -91 kg +91 kg
Defunct Categories: Men: -63.5 kg -67 kg -71 kg +81 kg

Men: Commonwealth Games:
-49 kg -52 kg -56 kg -60 kg -64 kg -69 kg -75 kg -81 kg -91 kg +91 kg
Defunct Categories: -48 kg -51 kg -53.5 kg -54 kg -57 kg -58 kg -61 kg -62 kg -63.5 kg -67 kg -71 kg -72.5 kg -73 kg -79.5 kg -80 kg +79.5 kg +80 kg +81 kg

Defunct Events:
Men: NBA World Championship:
Flyweight Bantamweight Featherweight Super Featherweight Lightweight Super Lightweight Welterweight Middleweight Light Heavyweight Heavyweight
Men: NYSAC World Championship:
Flyweight Bantamweight Featherweight Super Featherweight Lightweight Super Lightweight Welterweight Middleweight Light Heavyweight Heavyweight
Men: IBU World Championship:
Flyweight Bantamweight Featherweight Welterweight Middleweight Light Heavyweight Heavyweight