3rd » The Osborne 1, the first successful portable computer, is unveiled at the West Coast Computer Faire in San Francisco.
4th » The Islamic Republic of Iran Air Force mounts an Attack on H3 e.g attack on H-3 Airbase and destroys about 50 Iraqi aircraft.
9th » The United States Navy U.S. Navy nuclear submarine USS George Washington SSBN-598 6 accidentally collides with the 'Nissho Maru', a Japanese cargo ship, sinking it.
11th » A massive Brixton riot (1981) named riot in Brixton, South London, results in almost 300 police injuries and 65 serious civilian injuries.
12th » The first launch of a Space Shuttle ('Space Shuttle Columbia called Columbia') takes place - the STS-1 mission.
14th » STS-1 The first operational space shuttle, Space Shuttle Columbia e.g Columbia (OV-102) completes its first test flight.
18th » The longest professional baseball game is begun in Pawtucket, Rhode Island named Pawtucket, Rhode Island. The game is suspended at 4:00 the next morning and finally completed on June 23.
25th » More than 100 workers are exposed to radiation during repairs of a nuclear power plant in Tsuruga, Fukui or Tsuruga, Japan.