1990
ID: 2069
15,361 school districts (down from 144,102 in 1930)
ID: 2069
1990
ID: 2070
Harken lands mysterious Bahrain oil deal; Abdullah Taha Bakhsh acquires 9.6% stake in Worthen
ID: 2070
1990
ID: 2071
German Currency Union creates deutsche mark dominance
ID: 2071
1990
ID: 2072
German reunification - now strongest European power
ID: 2072
1990
ID: 2073
Kohl-Mitterrand joint letters advocate for accelerating political union
ID: 2073
1990
ID: 2074
Chief Financial Officers Act requires all major federal agencies to have qualified CFOs
ID: 2074
1990
ID: 2075
Hubble Space Telescope launched using mathematical optics and orbital mechanics
ID: 2075
1990
ID: 2076
Edward Witten develops topological quantum field theory
ID: 2076
1990
ID: 2077
ADHD medication prescriptions increase from around 5 million in 1991
ID: 2077
1990
ID: 2078
Ritalin dominates treatment through early 1990s; mid-1990s: Adderall emerges as major competitor
ID: 2078
1990
ID: 2079
Healthcare system under pressure to deliver care 'much more quickly and much more cheaply'
ID: 2079
1990
ID: 2080
Brazilian mass MMR campaign reveals 'significant increase in aseptic meningitis'
ID: 2080
1990
ID: 2081
WHO changes pertussis case definition to inflate vaccine effectiveness
ID: 2081
1990
ID: 4443
Haskell 1.0 released by committee - pure functional language with lazy evaluation, monads for I/O
ID: 4443
1990
ID: 5789
Apple variety revival begins - from 20 commercial varieties to hundreds of heirlooms rediscovered, craft cider returns
ID: 5789
1990
ID: 4402
November 1990
ARM Ltd spun out from Acorn - designs low-power RISC processors, licenses to others, dominates mobile
ID: 4402
1990
ID: 2068
December 7, 1990
December 7: Pope John Paul II issues 'Redemptoris Missio' on missionary activity
ID: 2068