21.   His research made him skeptical that monetary policy, which operates through interest rates, could keep the economy on a steady upward climb.

22.   Huge swaths of the economy operate through barter transactions controlled by insiders rather than by impersonal market forces.

23.   In Missouri, Civic Development operates through a company called Public Safety Services, which in turn does business under the name Fundraising Services LLC.

24.   In the new versions of the operation, surgeons operate through an incision of three or fewer inches long.

25.   In the Bay Area, it operates through TCI Cable.

26.   Initially, the two doctors operated through a small uterine hole, using tiny instruments and a miniature camera as a guide.

27.   Instead, they expect to operate through tactical agreements based on the issues at hand.

28.   It goes into operation at the start of December and will operate through the first part of next year.

29.   Its catheters and other products let surgeons operate through small incisions, reducing both costs and patient trauma.

30.   It operated through a company called Third World Personnel Services.