science and technology

technical

(computing) information technology (the practice of creating and/or studying computer systems and applications)

reuse

user; consumer / employer

employee / servant

something that has gone unused

(disaster prevention) Short for 木造住宅密集地域 (mokuzō jūtaku misshū chiiki, “densely built wooden house area”).

an unused item

British Antarctic Territory (an overseas territory in the Antarctic administered by the United Kingdom, and also including the South Orkney Islands and South Shetland Islands)