TechnologyTechnology short essays aiming to share opinion and concepts acquired after 20+ years career in telecom market. 5G Converged Charging: Overview, Specifications and Challenges Policy Control and Charging – An Evolving Architecture Helping Disruptive Business Models Push Notification Architecture Using React and Node.JS Online Charging Future – Evolve or Die? What about MNOs’ IoT Business Models? The API Exposure by Telecom Operators Paradox