The phrase research and development (also R and D or, more often, R&D), according to the Organization for Economic Co-operation and Development, naked celebrities
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refers to "creative work undertaken on a systematic basis in order to increase the stock of knowledge, including knowledge of man, culture and society, and the use of this stock of knowledge to devise new applications".

Research and development is often scientific or towards developing particular technologies and is frequently carried out as corporate or governmental activity.