An
acronym
is
an
abbreviation
formed
from
the
initial
letters
of
words.
Depending
on
how
many
of
the
constituent
words
begin
with
vowels
and
the
phonotactics
of
the
language
an
acronym
exists
in,
acronyms
can
be
pronounced
as
a
word,
as
a
series
of
the
names
of
the
letters,
or
some
combination
of
the
two.
Sometimes
acronyms
have
idiosyncratic
pronunciations,
like
NAACP,
which
is
pronounced
"N
double
A
C
P".
Acronyms
often
occur
in
jargon
or
as
names
of
organizations
because
they
often
serve
as
abbreviations
of
long
terms
that
are
frequently
referenced,
so
a
shortened
form
is
desirable.
Cynics
have
quipped
that
acronyms
are
used
to
obfuscate.
Traditionally,
abbreviations
use
a
period
to
mark
the
part
that
was
deleted.
In
the
case
of
acronyms,
each
letter
is
its
own
abbreviation,
and
gets
its
own
period.
However,
this
usage
is
becoming
less
common
as
the
presence
of
all
capital
letters
is
sufficient
to
indicate
the
word
is
an
abbreviation;
however,
some
influential
usage
guides
insist
on
the
many-periods
treatment,
such
as
the
one
used
by
the
New
York
Times.
Some
acronyms
undergo
assimilation
into
ordinary
words:
often
they
are
written
in
lower
case,
and
eventually
it
is
widely
forgotten
that
the
word
was
derived
from
the
initials
of
others:
scuba
and
laser,
for
instance.
The
term
anacronym
has
been
coined
as
a
combination
of
the
words
"anachronism"
and
"acronym"
to
describe
acronyms
whose
original
meaning
is
forgotten.
There
is
debate
over
whether
the
word
acronym
can
be
applied
to
any
set
of
initials.
Some
people
insist
an
acronym
is
only
a
set
of
initials
which
is
pronounceable
as
a
word.
Some
dictionary
definitions
can
be
interpreted
to
support
this
view.
Under
this
view,
sets
of
initials
like
"BBC"
and
"IBM"
are
initialisms
and
not
acronyms.
On
the
other
hand,
under
the
restrictive
definition
of
'acronym'
there
is
no
English
word
to
describe
all
strings
of
initials
that
are
used
in
place
of
the
full
words.
For
many
people,
the
word
acronym
is
used
for
all
such
sets
of
initials
regardless
of
whether
they
are
pronounced
as
a
word
or
as
the
names
of
the
letters
in
sequence.
Sometimes
non-initial
letters,
and
the
initials
of
short
function
words
(such
as
"and",
"or",
"of",
or
"to")
are
included
in
the
acronym
to
make
it
pronounceable,
in
contradiction
to
the
normal
rule
for
abbreviation.
Additionally,
abbreviations
like
"Interpol"
and
"Gestapo"
that
consist
mostly
of
non-initial
letters
of
constituent
words
are
often
called
acronyms,
although
some
people
insist
they
are
properly
called
portmanteaus.