1.   Using the code requires incredible feats of memory.

2.   And they admit that using the Web requires less exertion.

3.   If using a cellular phone requires that the set be hand-held, that leaves only one hand for driving.

4.   The rolls stay where you put them better than blown cellulose, but using the rolls requires some measuring and cutting.

5.   Using the raw material requires a higher heat, thus more energy.

6.   Using this system requires a network card with a different kind of plug than the one described in those previous columns.

7.   Using a stepladder requires the same precautions as with an extension ladder, with just a few modifications.

8.   Using the program requires a Windows-based PC with a broadband connection.

9.   Using the utility requires an Iomega Zip, Jaz or Peerless drive and enough disks to hold the amount of data to be moved.

10.   Using Minex required banks to install a Fujitsu Ltd. computer described by bank users as almost the size of a refrigerator.