The Collaborative International Dictionary of English v.0.48:

Boa \Bo"a\ (b[=o]"[.a]), n.; pl. Boas. [L. boa a kind of water
   serpent. Perh. fr. bos an ox.]
   1. (Zool.) A genus of large American serpents, including the
      boa constrictor, the emperor boa of Mexico (Boa
      imperator), and the chevalier boa of Peru (Boa eques).
      [1913 Webster]

   Note: The name is also applied to related genera; as, the
         dog-headed boa (Xiphosoma caninum).
         [1913 Webster]

   2. A long, round fur tippet; -- so called from its
      resemblance in shape to the boa constrictor.
      [1913 Webster]

WordNet (r) 3.0 (2006):

boa
    n 1: a long thin fluffy scarf of feathers or fur [syn: feather
         boa, boa]
    2: any of several chiefly tropical constrictors with vestigial
       hind limbs

V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

BOA
       Basic Object Adapter


The Jargon File (version 4.4.7, 29 Dec 2003):

boa
 n.

    Any one of the fat cables that lurk under the floor in a dinosaur pen.
    Possibly so called because they display a ferocious life of their own when
    you try to lay them straight and flat after they have been coiled for some
    time. It is rumored within IBM that channel cables for the 370 are limited
    to 200 feet because beyond that length the boas get dangerous ? and it is
    worth noting that one of the major cable makers uses the trademark
    ?Anaconda?.


The Free On-line Dictionary of Computing (30 December 2018):

Basic Object Adapter
BOA

    (BOA) Part of the CORBA architecture.

   [Details?]

   (2004-06-23)


The Free On-line Dictionary of Computing (30 December 2018):

boa

   [IBM] Any one of the fat cables that lurk under the floor in a
   dinosaur pen.  Possibly so called because they display a
   ferocious life of their own when you try to lay them straight
   and flat after they have been coiled for some time.  It is
   rumored within IBM that channel cables for the 370 are limited
   to 200 feet because beyond that length the boas get dangerous
   --- and it is worth noting that one of the major cable makers
   uses the trademark "Anaconda".

   [Jargon File]