11.   IBM executives cautioned that while the breakthrough is cause for scientific excitement, it would not immediately translate into the next generation of disk drives.

12.   In a conference call with industry analysts on Thursday, Daimler executives cautioned that problems in the United States would not end quickly.

13.   Other U.S. executives here caution, however, a copyright law is only meaningful if enforced.

14.   Real estate executives cautioned that a deal had not been signed.

15.   Several executives cautioned that Armstrong was not the only candidate still in contention for the job.

16.   Several executives cautioned that the states could still decide to postpone the lawsuit.

17.   Still, Microsoft executives cautioned once again that future sales and earnings may not rise as fast as they have in the past.

18.   Still, some executives cautioned that China needs to do more than simply cut taxes.

19.   The executives also cautioned that the companies could decide to abandon the effort.

20.   The executives cautioned that the negotiations could still break down.