.NET is a free, cross-platform, open source developer platform for building many different types of applications. With .NET, you can use multiple languages, editors, and libraries to build for web, mobile, desktop. SQL (pronounced "ess-que-el") stands for Structured Query Language. SQL is used to communicate with a database.The Open Charge Point Protocol(OCPP) is an application protocol for communication between Electric vehicle charging stations and a central management system, also known as a charging station network, similar to cell phones and cell phone networks.