91.   BreathAlert, from the Japanese health-products company Tanita, works by measuring, among other things, the amount of volatile sulfur compounds given off by bacteria.

92.   -- A collaborative scheme that helps groups work together by tracing discussions and keeping track of issues, documents and even snippets of conversation.

93.   - Store owners work by appointment.

94.   --- The basic mechanism by which muscles work is no mystery.

95.   A digital signature works by turning identifying information into a secret code that only the participating parties can unscramble.

96.   A handful of showpieces with piano follow, including works by Wieniawski, Kreisler and Dvorak.

97.   A gift shop has both translations of Yiddish books and works by contemporary Jewish writers.

98.   A newer type of stud finder works by detecting density changes in a wall.

99.   A return to work by the Newspaper Guild members will require a binding vote, which has been scheduled for Sunday.

100.   A wireless phone works by transmitting and receiving radio signals to and from the nearest cell site.