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Language peer sets for CHLF:
United Kingdom↑
United Kingdom/1962↑
Designed 1962 ↑
1960s languages ↑
Second generation↑
Early Cold War↑
Genus Early Autocodes ↑
Multi-purpose ↑
Early Autocodes↑
Autocodes↑
UK historic algorithmic systems ↑
Early Autocodes/1962↑
Autocodes/1962↑
UK historic algorithmic systems/1962↑
Early Autocodes/United Kingdom↑
Autocodes/United Kingdom↑
UK historic algorithmic systems/United Kingdom↑
Multi-purpose ↑
Multi-purpose/1962↑
Multi-purpose/uk ↑

CHLF(ID:4925/chl002)

Extension of Mercury Autocode to run on IBM 7090

alternate simple view

Country: United Kingdom
Designed 1962
Genus: Early Autocodes
Sammet category: Multi-purpose

for Cern, Harwell, London, Farnborough autocode

Co-operative effort between CERN, Harwell Atomic plant, University of London Computer Unit and Royal Aircraft Establishment, Farnborough to make an extended MERCURY AUTOCODE

DC Cooper et al Operational Nov 1961

Places

Related languages

CERN Autocode	→	CHLF	Subsumed
Mercury Autocode	→	CHLF	Extension of
CHLF	→	CHLF3	Extension of

References:

Bemer, R (1962) Bemer, R "ISO TC97/SC5/WGA(1) Survey of Programming Languages and Processors" December 1962
in [ACM] (1963) [ACM] CACM 6(03) (Mar 1963)

Nixon, W. L. B.: (1964) Nixon, W. L. B.: "An introduction to CHLF AUTOCODES" I.C.S. 1964
in [ACM] (1963) [ACM] CACM 6(03) (Mar 1963)

Nixon, W.L.B. (1966) Nixon, W.L.B. "The EXCHLF Autocode Handbook" University of London Press,University of London,1966, Provisional Version Extract: Historical summary
in [ACM] (1963) [ACM] CACM 6(03) (Mar 1963)

Howlett, Jack (1979) Howlett, Jack "Computing at Harwell 1948-1961" Atlas Computer Laboratory Report 1979 Extract: Autocodes
in [ACM] (1963) [ACM] CACM 6(03) (Mar 1963)
Resources

Computing at RAE Farnborough 1948-1968 Systems Programming

A Programming Systems Division was formed in the first part of 1964 to

Formulate requirements for the new general service RAE machine (This work on requirements specification is mentioned above under 'The ICL 1907')
Devote more effort to the study of compiling and operating systems for timesharing.
In January 1965. it was reported that work was proceeding on CHLF3 Autocode translator for the Elliott 503 computer (this is believed to have been a Structures Department machine) and was expected to complete in August 1965. [CHLF stands for CERN - Harwell - London - Farnborough, the participants in the production of that particular version of Mercury Autocode.] An Autocode to FORTRAN translator was also being prepared. The January 1966 report noted that the CHLF3 compiler (on 503) was completed and in limited use. Work on the Autocode to FORTRAN translator was still in progress. A review of simulation languages was being undertaken.

By summer 1966, consideration was being given to the implementation of a multi-access system. The CHLF3 compiler for running programs on Elliott 503 was reported as being fully tested and in general use. The review of simulation languages had found that CSL, available on the 1907, is one of the best!

By the start of 1967, details of ICL's proposed operating system for the 1907 were being obtained. Experience was being gained with CSL. The format of acceptance trials for the ICL 1907 was being worked out and an EMA (Extended Mercury Autocode) syntax checker for use with remote consoles was being developed.

Summer 1967 saw the development of a multi-access system (MINIJOSS) to enable 5 teletypes to be on-line to Mercury. This was to provide experience for MOP (Multiple On-line Programming).

In January 1968 it was observed that satellite programs were being written in FORTRAN. The operating system for the 1907 was to be that developed by Queen's University, Belfast at first. Then this would be replaced by GEORGE3, G3. Two members of the division had been seconded to ICL - one to work on the EMA disc compiler and one on G3.

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