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From The Free On-line Dictionary of Computing (05 January 2017) [foldoc]:
glob
/glob/ A mechanism that returns a list
of pathnames that match a pattern containing wild card
characters. Globbing was available in early versions of Unix
and, in more limited form, in Microsoft Windows.
The characters are:
* = zero or more characters, e.g. "probab*" would match
probabilistic, probabilistically, probabilities, probability,
probable, probably.
? = any single character, e.g. "b?g" would match bag, big, bog,
bug.
[] any of the enclosed characters, e.g. "b[ao]g" would match bag,
bog (not on Windows).
These have become sufficiently pervasive that hackers use them in
written messages. E.g. "He said his name was [KC]arl" (expresses
ambiguity). "I don't read talk.politics.*" (any of the
talk.politics subgroups on Usenet). Other examples are given
under the entry for X.
Later Unix shells introduced the x,y,z syntax which expands to a
comma-separated list of alternatives, thus foobaz,qux would
expand to "foobaz" and "fooqux". This differs from a glob because
it generates a list of all possible expansions, rather than
matching against existing files.
Glob patterns are similar, but not identical, to {regular
expressions}.
"glob" was a subprogram that expanded wild cards in archaic
pre-Bourne versions of the Unix shell. It is also a
bulit-in function in Perl.
(2014-08-22)