A phrase used to introduce examples that illustrate or clarify a general statement. It signals that what follows are specific instances of a broader category.
This phrase combines 'such' from Old English 'swylc' (of that kind) with 'as' to create a construction for introducing examples. It became standardized in Middle English as a formal way to provide illustrations without claiming to be exhaustive.
While 'such as' and 'like' often mean the same thing, 'such as' sounds more formal and academic. Interestingly, it implies that the examples given are representative but not complete - it's a way of saying 'including but not limited to' more elegantly.
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