Signature or prototype or either?

[mark4asp]

In Amit Kalani's book (0789728222, 70-315 exam prep. book) he
says that:
"a delegate is a special class whose object is
capable of storing references to methods with
a particular prototype"

elsewhere (in C# books I'm studying) the term used is signature.
Is it signature or prototype or either? If there are two terms
for the same thing then why would that be?

 

[Bruce Wood]

"Prototype" is a word that has been in use in the programming world for
decades. "Method signature" is a newer term for essentially the same
thing. Like all natural languages, computing terminology grows and
expands, and in the process you get multiple terms for the same thing.

(You also get terms that start out meaning something specific, but then
become blurred and bastardized with time, usually the fault of
marketing departments. Does anyone know anymore what
"object-oriented" means? "Data-driven"? "Open architecture"?)