research and development
US /ˌriː.sɝːtʃ ən dɪˈvel.əp.mənt/
UK /ˌriː.sɝːtʃ ən dɪˈvel.əp.mənt/

1.
systematic investigation or experimentation aimed at discovering or revising facts, theories, applications, etc.
:
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The company invests heavily in research and development to create new products.
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Many technological advancements come from dedicated research and development efforts.