11.   The only requirement is that subscribers use the WorldNet at least one hour monthly.

12.   VoiceStream Wireless is the only carrier now using the GSM operating network that allows subscribers to use their same phone and phone number when traveling in Europe and Japan.

13.   Voter News Service transmits its predictions on primary election nights with the understanding that subscribers will not use them before the polls close, Ms. Shapiro said.

14.   WebTV, introduced by Microsoft about three years ago, is a service that lets subscribers use their televisions instead of computers to access the Internet.

15.   CamGSM already has established agreements for its subscribers to use their phones in Hong Kong and Singapore and expects more agreements with other nations shortly.

16.   Col. Usman, the manager of Mobilink cellphone company, testified that phone records can show what subscriber was using the phone at what time, Quereshi said.

17.   The company has argued it is not to blame for how subscribers use copyrighted material.

18.   The computer then calls the subscriber back, delivering a dial tone the subscriber can use to make a low-cost overseas call.

19.   GSM is an international mobile telephone network, which enables subscribers to use their cellular phones in any country connected to the service.

20.   Sudan is also working to get the system, under which a subscriber can use the same number in any country using GSM.