Complex sentence: In 1985, Peterffy introduced his computer system to the New York Stock Exchange (NYSE), which allowed it, however only in use at trading booths several yards away from where transactions were executed.
Split into simpler sentences: In 1985, Peterffy introduced his computer system to the New York Stock Exchange (NYSE), which allowed it. However, the stock exchange only allowed it to be used at trading booths several yards away from where transactions were executed.