In this RedMonk conversation, Andy Stanford-Clark, Distinguished Engineer and Innovation Leader in IBM Research, and Clemens Vasters, Principal Architect at Microsoft, chat with Kate Holterhoff, senior analyst at RedMonk, about the history and evolution of messaging technology. They trace messaging to its roots from early telco technologies to modern events and streaming systems. The conversation highlights the significance of message queues, the role of IBM and Microsoft in advancing message-oriented middleware, and the evolution of open protocols like MQTT, AMQP, and CloudEvents.