Single threaded asynchronous programming

the execution of an entire task from beginning to end without interruption .

A single application can have different threads within the same address space using resource sharing. It is more economical to use threads as they share the process resources . … In a multiprocessor architecture, each thread can run on a different processor in parallel using multithreading.

Using single-threaded apartments (the apartment model process) offers a message-based paradigm for dealing with multiple objects running concurrently . It enables you to write more efficient code by allowing a thread, while it waits for some time-consuming operation to complete, to allow another thread to be executed.