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Suggestion boxes

David Nunan

It may not be a high-tech device, but the suggestion box has probably done more to boost corporate efficiency over the years even the most powerful computer. Suggestion boxes allow workers to recommend ways of making their jobs easier and offer employers the chance to save money - or make even more.

Listen In, Second Edition, Student Book 1, Thomson Heinle

Another way of saying “It may not be a high-tech device, but the suggestion box has probably done a lot to boost corporate efficiency” is