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b [n]
 
1)the blood group whose red cells carry the B antigen
    Synonyms :group_b type_b 
    See Also: blood_group 
 
2)aerobic rod-shaped spore-producing bacterium; often occurring in chainlike formations; found primarily in soil
    Synonyms :bacilli bacillus 
    See Also: eubacteria  genus_bacillus  anthrax  bacillus_globigii  yersinia_pestis 
 
3)originally thought to be a single vitamin but now separated into several B vitamins
    Synonyms :b-complex_vitamin b_complex b_vitamin vitamin_b vitamin_b_complex 
    See Also: water-soluble_vitamin  choline  inositol  pantothen  aneurin  antipernicious_anemia_factor  hepatoflavin  adermin  folacin  niacin  biotin 
 
4)a trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder
    Synonyms :atomic_number_5 boron 
    See Also: chemical_element  kernite  borax 
 
5)a logarithmic unit of sound intensity equal to 10 decibels
    Synonyms :bel 
    See Also: sound_unit 
 
6)(physics) a unit of nuclear cross section; the effective circular area that one particle presents to another as a target for an encounter
    Synonyms :barn 
    See Also: area_unit  atomic_physics 
 
7)the 2nd letter of the Roman alphabet
    Synonyms :
    See Also: alphabetic_character  latin_alphabet 
 

From The Free On-line Dictionary of Computing: (http://www.foldoc.org/, Editor Denis Howe)

1. byte.

2. A systems language written by Ken Thompson in 1970 mostly for his own use under Unix on the PDP-11. B was later improved by Kerninghan(?) and Ritchie to produce C. B was used as the systems language on Honeywell's GCOS-3.

B was, according to Ken, greatly influenced by BCPL, but the name B had nothing to do with BCPL. B was in fact a revision of an earlier language, bon, named after Ken Thompson's wife, Bonnie.

["The Programming Language B", S.C. Johnson & B.W. Kernighan, CS TR 8, Bell Labs (Jan 1973)].

[Features? Differences from C?]

(1997-02-02)

3. A simple interactive programming language by Lambert Meertens and Steven Pemberton. B was the predecessor of ABC.

ftp://ftp.uni-kl.de/pub/languages/B.tar.Z.

["Draft Proposal for the B Language", Lambert Meertens, CWI, Amsterdam, 1981].

4. A specification language by Jean-Raymond Abrial of B Core UK, Magdalen Centre, Oxford Science Park, Oxford OX4 4GA. B is related to Z and supports development of C code from specifications. B has been used in major safety-critical system specifications in Europe, and is currently attracting increasing interest in industry. It has robust, commercially available tool support for specification, design, proof and code generation.

E-mail: Ib.Sorensen@comlab.ox.ac.uk.

(1995-04-24)



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