Low Level Asynchronous Service Handling

• What asynchronous service providers do
  This document describes the purpose of asynchronous service providers.
• Asynchronous service provider's responsibilities
  This document describes the functionality required from an asynchronous service provider.
• How to handle a single asynchronous request
  This document describes how to handle a single asynchronous request.
• How to handle multiple asynchronous requests with a wait loop
  This document describes how to handle multiple asynchronous requests with a wait loop.
• Cancelling an asynchronous request
  This document describes how to cancel an asynchronous request.