Hundreds of books from the Yale-NUS College library were reportedly sent for disposal or recycling on Tuesday, triggering an outcry from its alumni and students. SINGAPORE: The National University Singapore (NUS) on Wednesday (May 21) apologised for an "operational lapse" in dealing with books from Yale-NUS College, which is shutting this year. Hundreds of books from the Yale-NUS College library were reportedly sent for disposal or recycling on Tuesday, triggering an outcry from its alumni and