11.   Beginning another chapter in the history of mail, the U.S. Postal Service on Monday announced the nationwide availability of postage that customers can buy over the Internet.

12.   A recent investigation by BBC radio found athletes were even buying it over the Internet.

13.   A Swiss cyclist is blaming something he bought over the Internet for testing positive for banned performance-enhancing drugs, the Associated Press reported.

14.   Alcohol is banned, but available, and most prescription drugs, including sleeping pills, amphetamines and anti-depressants, can be bought over the counter without prescriptions.

15.   Also helpful is creating an imaginary stock portfolio of the companies selling products teens buy over the summer.

16.   But fear about having a credit card number intercepted appears to keep many online shoppers from buying over the Web.

17.   But fear about having a credit card number intercepted appears to keep many on-line shoppers from buying over the Web.

18.   Can we put it on our Visa, buy it over the Internet?

19.   Contraceptive jellies and foams that contain a spermicide can be bought over the counter, but many women consider them messy and less effective.

20.   For instance, Osterholm said, crop-dusting airplanes can be bought over the Internet.