The Coveted Cricket Trophy Was First Hosted In 1975 In A 60-Over Format. The Cup Was Sponsored By Prudential Life Insurance Hence It Was Called The Prudential World Cup. The First Three World Cups (1975 1979 And 1983) Were Known As Prudential World Cups. The 1987 World Cup Was The First One To Be Held In The 50-Over Format. It Was Jointly Hosted By India And Pakistan And Sponsored By Reliance Group Hence It Was Named Reliance World Cup 1987. Icc World Cup History: Prudential Cup Reliance Cup