Who has call back systems and who uses them? About 40% of businesses offer a telephony queue call back option, according to ContactBabel. More businesses are adding call back functions, hoping to help ...

A callback operation in Java is one function that is passed to another function and executed after some action is completed. A callback can be executed either synchronously or asynchronously. In the ...

Once while we were waiting in line to give money to a bank teller, my mother told me that businesses that make you stand in line insult their customers. Being on hold, or simply being in a queue, is a ...