> Java, Lua, Ruby These are all under the general term threading. You still have to pass messages or set up semaphores to use them. The code is still separated

> Java, Lua, Ruby These are all under the general term threading. You still have to pass messages or set up semaphores to use them. The code is still separated between main and sub/worker/thread. > Go HTTP server Every HTTP server lib handles requests in this way. You cannot write an HTTP client, however, without explicit asynchronous code like callbacks, threads, or what have you.