* 1973 – Launch of Pioneer 11 spacecraft.

* 1973 – The American League of Major League Baseball begins using the designated hitter.

* 1973 – Donnie Edwards, American football player

* 1973 – Randall Godfrey, American football player

* 1973 – Joe Machine, English artist, poet and writer

* 1973 – Rie Miyazawa, Japanese actress and model

* 1973 – Sun Wen, Chinese footballer

* 1973 – J. Scott Campbell, American writer and illustrator

* 1973 – Claudia Jordan, American model

* 1973 – Christina Moore, American actress

* 1973 – Antonio Osuna, Mexican baseball player

* 1973 – Watergate Scandal: U. S. President Richard Nixon announces that top White House aides H. R.

* 1948 – Alexander Onassis, American Greek socialite, son of Greek shipping magnate Aristotle Onassis ( d. 1973 )

* 1973 – Jeff Timmons, American singer and producer ( 98 Degrees )

* 1973 – Kinna McInroe, American actress

* 1908 – Lyndon B. Johnson, American politician, 36th President of the United States ( d. 1973 )

* 1973 – Jazz, American wrestler

* 1973 – Cory Bowles, Canadian actor and choreographer

* 1973 – Danny Coyne, Welsh footballer

* 1973 – Dietmar Hamann, German footballer

* 1973 – Burak Kut, Turkish singer-songwriter

* 1973 – Johan Norberg, Swedish author

* 1973 – Vera Farmiga, American actress

* 1973 – Monica Goodling, American lawyer

* 1973 – Max Kellerman, American sportscaster

* Gerhard Doerfer ( 1963, 1966, 1967, 1968, 1972, 1973, 1974, 1975, 1981, 1985, 1988, 1993 ).

His Elo rating shot from 2540 in 1971 to 2660 in 1973, when he shared second in the USSR Chess Championship, and finished equal first with Viktor Korchnoi in the Leningrad Interzonal Tournament, with the latter success qualifying him for the 1974 Candidates Matches, which would determine the challenger of the reigning world champion, Bobby Fischer.

In 1973 and 1974 the Soviet media campaign targeted both Andrei Sakharov and Aleksandr Solzhenitsyn.

In 1973 Andrei Sakharov was nominated for the Nobel Peace Prize and in 1974 was awarded the Prix mondial Cino Del Duca.

A Little Night Music opened on Broadway at the Shubert Theatre on February 25, 1973, and closed on August 3, 1974 after 601 performances and 12 previews.

The Orioles experienced their greatest success from 1964 – 1983, as well as 1996-1997, winning eight Division Championships ( 1969 – 1971, 1973 – 1974, 1979, 1983, 1997 ), six pennants ( 1966, 1969 – 1971, 1979, 1983 ), three World Series Championships ( 1966, 1970, 1983 ), one wild card berth ( 1996 ), and five Most Valuable Player awards ( 3B Brooks Robinson 1964, OF Frank Robinson 1966, 1B Boog Powell 1970 and SS Cal Ripken Jr. 1983 & 1991 ).

The Orioles would miss the playoffs in 1972, but rebounded to win the division in 1973 and 1974.

He argues that the power ballad broke into the mainstream of American consciousness in 1976 as FM radio gave a new lease of life to earlier songs like Led Zeppelin's " Stairway to Heaven " ( 1971 ), Aerosmith's " Dream On " ( 1973 ), and Lynyrd Skynyrd's " Free Bird " ( 1974 ).

1973 ); Charles Berlitz ( The Bermuda Triangle, 1974 ); Richard Winer ( The Devil's Triangle, 1974 ), and many others, all keeping to some of the same supernatural elements outlined by Eckert.

The roles of Bet Lynch, Ivy Tilsley ( Lynne Perrie ), Deirdre Hunt ( Anne Kirkbride ), Rita Littlewood ( Barbara Knox ) and Mavis Riley ( Thelma Barlow ) were built up between 1972 and 1973 with characters such as Gail Potter ( Helen Worth ), Blanche Hunt ( Patricia Cutts and Maggie Jones ) and Vera Duckworth ( Elizabeth Dawn ) first appearing in 1974.

These were: Lola Versus Powerman and the Moneygoround, Part One ( 1970 ), Muswell Hillbillies ( 1971 ), Preservation: Act 1 ( 1973 ), Preservation: Act 2 ( 1974 ), Soap Opera ( 1975 ) and Schoolboys in Disgrace ( 1976 ).

The first Soviet-made pocket-sized calculator, the " Elektronika B3-04 " was developed by the end of 1973 and sold at the beginning of 1974.

Claims have been made for Manu Dibango's " Soul Makossa " ( 1972 ), Jerry Butler's " One Night Affair " ( 1972 ), the Hues Corporation's " Rock the Boat " ( 1973 ), George McCrae's " Rock Your Baby " ( 1974 ), and " Kung Fu Fighting " ( 1974 ) by Biddu and Carl Douglas.

This time, IBM submitted a candidate which was deemed acceptable — a cipher developed during the period 1973 – 1974 based on an earlier algorithm, Horst Feistel's Lucifer cipher.

After a vote by the APA trustees in 1973, and confirmed by the wider APA membership in 1974, the diagnosis was replaced with the category of " sexual orientation disturbance ".

Released in late 1973, the song topped the singles chart in February 1974, and reached the lower regions of Billboard's Hot 100 ( it eventually also charted in the UK, reaching No. 7 in 1976, representing Parton's first UK success ).

Ethernet was developed at Xerox PARC between 1973 and 1974.

Other legislation included National Environmental Policy Act ( NEPA ), signed into law in 1970, which established a United States Environmental Protection Agency and a Council on Environmental Quality ; the Marine Protection, Research, and Sanctuaries Act of 1972 ; the Endangered Species Act of 1973, the Safe Drinking Water Act ( 1974 ), the Resource Conservation and Recovery Act ( 1976 ), the Water Pollution Control Act Amendments of 1977, which became known as the Clean Water Act, and the Comprehensive Environmental Response, Compensation, and Liability Act, commonly known as the Superfund Act ( 1980 ).

Don Daglow wrote an enhanced version of the program called Ecala on a PDP-10 mainframe computer at Pomona College in 1973 before writing what was possibly the second or third computer role-playing game, Dungeon ( 1975 ) ( The first was probably " dnd ", written on and for the PLATO system in 1974, and the second may have been Moria, written in 1975 ).

On 9 August 2010, Eagle Rock Entertainment released Live – The Early Years in the UK as a DVD compilation that includes Fusion – Live in London ( 1976 ) along with never before released live performances at Brunel University ( 1973 ) and on a German TV show Rockpalast ( 1974 ).

The first full-length feature produced under the BFI's new scheme was Kevin Brownlow and Andrew Mollo's Winstanley ( 1975 ), while others included Moon Over the Alley ( 1975 ), Requiem for a Village ( 1975 ), the openly avant-garde Central Bazaar ( 1973 ), Pressure ( 1975 ) and A Private Enterprise ( 1974 ) -- the last two being, respectively, the first British Black and Asian features.

Works such as Marjorie Rosen ’ s Popcorn Venus: Women, Movies, and the American Dream ( 1973 ) and Molly Haskell ’ s From Reverence to Rape: The Treatment of Women in Movies ( 1974 ) analyze how the women portrayed in film related to the broader historical context, the stereotypes depicted, the extent to which the women were shown as active or passive, and the amount of screen time given to women.

The FIH introduced competitive tournaments in 1974, forcing the acceptance of the principle of competitive field hockey by the IFWHA in 1973.