Events of 1983
| Internet is born | |
| February 28: | Final episode of M*A*S*H airs The final episode is seen by the largest audience ever to watch a televsion program. |
| March 23: | Strategic Defense Initiative (1983-1993) Reagan announces initiative to develop a space based system, also known as "Star Wars", to defend the U.S. from ballistic missiles. |
| March 24: | First test tube babies in America born Heather Jean and Todd McDonald Tilton become parents of first set of twins conceived in vitro and born in the United States. |
| June 18: | Sally Ride becomes first American woman in space |
| September 1: | USSR shoots down commercial Korean airliner Soviet fighters shoot down KAL Flight 007 after it enters Soviet airspace. 269 people on board are killed. |
| October 23: | Beirut terrorist bombing attack A truck bomb kills over 200 in a U.S. Marine barracks in Beirut, Lebanon. |
| October 25: | U.S. invades Grenada The United States invade Grenada to rescue 1,000 Americans on the island, days after a military Marxist government seized power in a bloody coup. |
| December 2: | Dr. Barney Clark receives first artificial heart implant Dr. Clark receives artificial heart implant, but dies 112 days after. |