# 

Name Year Country Science 
achievements 
991 

Charles E. Leiserson
0
Computer science

cacheoblivious algorithms, provably good workstealing, coauthor of Introduction to Algorithms

992 

Douglas Lenat
0
Computer science

artificial intelligence, Cyc

993 

Rasmus Lerdorf
0
Computer science

PHP

994 

George Paget Thomson
18921975 United Kingdom Physics

codiscovered electron diffraction

995 

Nikolay Mikhaylovich Przhevalsky
18391888 Russia

describe the only extant species of wild horse,which is named after him: Przewalski's horse

996 

Andrey Nikolaevich Kolmogorov
19031987 Russia Mathematics, Computer science

significant contributions to the mathematics of probability theory, topology, intuitionistic logic, turbulence, classical mechanics, algorithmic information theory and computational complexity

997 

Enrico Betti
18231892 Italy Mathematics

Betti numbers, discovered Betti's theorem, a result in the theory of elasticity

998 

Benjamin Collins Brodie
17831862 United Kingdom

pioneered research into bone and joint disease





999 

David George Kendall
19182007 United Kingdom Mathematics

work on probability, statistical shape analysis, ley lines and queueing theory

1 000 

JacSue Kehoe
1935 USA

discovered that one neurotransmitter can have multiple types of receptors
