I suddenly realized that the lonely “{“ and “}” symbols get no use on my keyboard. In fact, I don’t even remember the poor dears’ names! Parentheses have always been the celebrity bookends, and I’m pretty sure the “[“’ is called a “bracket”.
But what of the {}s? What’s their story? Prepare thyselves, we shall ferret out the {truth}no matter how long it takes or how far afield we must trav—
—Here it is. Second link barfed up by Dogpile. A bracing {adventure}!
World's Only Rational Man 
Wëll, ßincë wë’rë göing tö dö it likë thiß, I güëßß I cän ädd ä fëw odd thingß, too. Šö, höw dö yöü likë it?
Curly braces {} are used in C and Java programming languages, in replacement of the more classic DO … END commands in generally obsolete languages, such as PL/1.
I use them daily…Here is some pseudo-code…
while(awake) {
think
play
eat
drink
if (wife is around) {
massage
sex
}
else {
// no comment, which is clever because // denotes a comment
}
}