An abbreviation composed of the first letters of other words so that
the abbreviation itself forms a word. For example:
CRASSH
[which is said "crash" not CEE ARE AY ESS ESS AYTCH]: Centre for Research in the Arts, Social Sciences, and Humanities Aids: acquired immune deficiency syndrome
Acronyms are treated just like ordinary words in a sentence, and may be composed of all capital letters, or of an initial capital followed by small letters. For example:
"Of 34 mothers who gave birth to children with
Aids at his hospital, only four had any symptoms of the disease."
An abbreviation consisting of initial letters pronounced separately is called
an initialism. For example:
WHO BBC