There is a sentence in Eclipse Paho Project website such as; "The Paho project provides scalable open-source client implementations of open and standard messaging protocols aimed... moreThere is a sentence in Eclipse Paho Project website such as; "The Paho project provides scalable open-source client implementations of open and standard messaging protocols aimed at new, existing, and emerging applications for Machine‑to‑Machine (M2M) and Internet of Things (IoT)."
I am confused a little bit. What is the difference between IoT and M2M?