You can send messages back-and-forth, which are overlaid on the maps as bubbles so you don't have to switch windows.
Analysts say Apple is trying to duplicate the success of services like BlackBerry Messenger, or BBM, a free application for BlackBerry smartphone owners that lets them send messages back and forth as in an instant-messaging conversation.
"Within an hour," she wrote, "we were sending messages back and forth".
She sent him a friend request on Facebook, and they began to write to each other, sending messages back and forth for hours at a time.
"When does the date start, or does it start when they are sending messages back and forth?" Mr. Campbell describes text messaging as the equivalent of passing notes in class, though they are more fragmentary and more frequent.
When I was at university, my flatmate got me hooked on going to the "computer room" of an evening and sending messages back and forth with some people that I somehow got connected with.
And he has been using computers for 15 years -- he was part of a proprietary network of dealers who were sending messages back and forth in the very early days of the Internet.
The trip from the elephant's skin to the brain and back again to the muscles to flick the tail is 100 times as long as the same trip in a shrew, according to a new study published in the Proceedings of the Royal Society B. The nervous system acts like an information superhighway, sending messages back and forth from the brain throughout the body.
This is the great genius and curse of email, that all you can do is send messages back and forth.
The service acts as a Twitter for businesses, letting employees send messages back and forth to subscribers.
The dispute motivated computer scientists to explore the question electronically, using so-called neural networks, computer programs in which layers of virtual neurons send messages back and forth.
