They approach strangers on the street in a type of missionary cold call known as a "fearless".
Another tape records a visit with the Washington Redskins' George Allen — perhaps to discuss the infamous call known as "Nixon's Play".
Male chimpanzees sometimes chorus in a call known as a pant-hoot, though usually to attract females to a new source of fruit they have found.
Each morning, senior officials assemble for a telephone conference call, known as the "chiefs' call" in which information about the case is disseminated from the investigation's command center in Montgomery County, north of Washington.
The average user of Internet voice calling, known as voice over Internet protocol, or VoIP, pays $25 a month for unlimited calling, according to VoipReview.org, a Web site that tracks the industry.
Add the increasingly common phenomenon of the accidental mobile phone call, known as a pocket-dial, to the ways in which technology is shrinking the world for military families.
WorldCom and Sprint, the nation's second- and third-largest long-distance companies, will also benefit from last week's agreement cutting the fees they pay to local phone companies to connect customers' calls, known as access charges.
You can hear the mixture of bubbling calls known as 'roo-kooing', and scouring sneezes from a long way off.
A new study shows that dolphins use their own unique calls, known as signature whistles, to introduce themselves to others when meeting at sea.
