Conundra, indeed: Using curly braces in English | James' Coffee Blog

This got me thinking: how are curly braces used in English today? Many English keyboards, such as the Macbook Air keyboard on which I am typing this blog post, have curly braces as a character you can type with the shift key pressed. If curly braces are on our keyboards, they would have to either have some use in language, or sufficient use as a punctuation in computational contexts?

I can't recall ever seeing these outside of the context of programming.