[boost] asio async call terminology

I'm working on my review and I want to make sure I am using the correct terminology. There two sorts of asynchronous calls that can be made. The first is a "operation" which results in one trip through the dispatcher. For instance asio::socket_stream::write_some(). Internally these are stored in operation classes, hence the terminology. The second I'm calling a "request" which results in one or more "operations" to occur before the user handler is dispatched. For instance asio::async_write() calls asio::stream_socket::write_some() one or more times. Does that sound right?