Lois Haibt
Encyclopedia
Lois Haibt was an American
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 Computer Scientist
Computer scientist
A computer scientist is a scientist who has acquired knowledge of computer science, the study of the theoretical foundations of information and computation and their application in computer systems....

, is perhaps most famous for being a member of the ten person team that invented FORTRAN
Fortran
Fortran is a general-purpose, procedural, imperative programming language that is especially suited to numeric computation and scientific computing...

, the first successful high level programming language
Programming language
A programming language is an artificial language designed to communicate instructions to a machine, particularly a computer. Programming languages can be used to create programs that control the behavior of a machine and/or to express algorithms precisely....

. She joined the FORTRAN team, which was led by John Backus
John Backus
John Warner Backus was an American computer scientist. He directed the team that invented the first widely used high-level programming language and was the inventor of the Backus-Naur form , the almost universally used notation to define formal language syntax.He also did research in...

, upon graduation from Vassar College
Vassar College
Vassar College is a private, coeducational liberal arts college in the town of Poughkeepsie, New York, in the United States. The Vassar campus comprises over and more than 100 buildings, including four National Historic Landmarks, ranging in style from Collegiate Gothic to International,...

. She was the only female member of the team.

"They took anyone who seemed to have an aptitude for problem-solving skills-bridge players, chess players, even women."-Lois Haibt,

After graduating from Vassar, where she did well in math and science, Lois Haibt was lured to I.B.M. by a starting salary of $5,100, nearly twice the offer from Bell Laboratories. "They told me it was a job programming computers," she said. "I only had a vague idea what that was. But I figured it must be something interesting and challenging, if they were going to pay me all that money."

“It was the kind of atmosphere where if you couldn’t see what was wrong with your program, you would just turn to the next person,” she recalled. “No one was worried about seeming stupid or possessive of his or her code. We were all just learning together.”

Lois Haibt was tasked with writing the computer module that analyzed the flow control from the part of the compiler that collected information about the program to be compiled and calculated (using Monte Carlo
Monte Carlo
Monte Carlo is an administrative area of the Principality of Monaco....

 simulations) the frequency with which the basic blocks of the program would be executed.
She was married to Luther H. Haibt and lived in Katonah, N.Y where she had a daughter Carolyn Mitchell. She worked for years as a systems analyst and researcher for Yorktown Heights IBM Research Laboratory, where her work included working on visualization of program structure using a program she developed to draw multilevel flow charts and in later years, she worked in the analysis of Petri Nets and generating programs from them.
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