The Operate template std::async runs the functionality f asynchronously (most likely in a independent thread which might be described as a part of a thread pool) and returns a std::future that can sooner or later keep the results of that function contact. 1) Behaves as though (2) is named with https://alphawireless.com/future-proofing-american-utilities-why-900-mhz-is-critical-for-utility-communications/