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From: tmoran@acm.org
Newsgroups: comp.lang.ada
Subject: Re: Anybody in US using ADA ?
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> Job postings try to look for very specific skills
  The necessary implication being that the design has already been
frozen - "we will be using this language, that database, this kind
of UI, ...".
  I read an interesting essay recently that pointed out that color TV,
UHF, and cable were all technically feasible in 1948 when TVs were in less
than 1% of American households.  But we had three black and white VHF
network channels for a very long time because of industry structure&power
reasons.  I suppose there were lots of job postings for B/W VHF tuner
designers, and few for people who knew UHF etc.