<P> At the University of Manchester, Alick Glennie developed Autocode in the early 1950s . A programming language, it used a compiler to automatically convert the language into machine code . The first code and compiler was developed in 1952 for the Mark 1 computer at the University of Manchester and is considered to be the first compiled high - level programming language . </P> <P> The second autocode was developed for the Mark 1 by R.A. Brooker in 1954 and was called the "Mark 1 Autocode". Brooker also developed an autocode for the Ferranti Mercury in the 1950s in conjunction with the University of Manchester . The version for the EDSAC 2 was devised by D.F. Hartley of University of Cambridge Mathematical Laboratory in 1961 . Known as EDSAC 2 Autocode, it was a straight development from Mercury Autocode adapted for local circumstances, and was noted for its object code optimisation and source - language diagnostics which were advanced for the time . A contemporary but separate thread of development, Atlas Autocode was developed for the University of Manchester Atlas 1 machine . </P> <P> In 1954, language FORTRAN was invented at IBM by John Backus; it was the first widely used high level general purpose programming language to have a functional implementation, as opposed to just a design on paper . It is still a popular language for high - performance computing and is used for programs that benchmark and rank the world's fastest supercomputers . </P> <P> Another early programming language was devised by Grace Hopper in the US, called FLOW - MATIC . It was developed for the UNIVAC I at Remington Rand during the period from 1955 until 1959 . Hopper found that business data processing customers were uncomfortable with mathematical notation, and in early 1955, she and her team wrote a specification for an English programming language and implemented a prototype . The FLOW - MATIC compiler became publicly available in early 1958 and was substantially complete in 1959 . Flow - Matic was a major influence in the design of COBOL, since only it and its direct descendent AIMACO were in actual use at the time . </P>

Where was the first high-level language operating system created