HMI Software is commonly referred to as the development application that will be used to create the runtime application for an HMI terminal. It’s important to understand this distinction as we will be going over the HMI development environments used by PLC and HMI programmers to create the screens rather than the end-user applications you will see at the plant level.
This is a companion discussion topic for the original entry at https://www.solisplc.com/tutorials/what-is-hmi-software-allen-bradley-free