BACnet

BACnet is a way for computers and other pieces of equipment like thermostats, security systems, and elevators to communicate with each other. It uses a special language, so that different types of equipment can talk to each other and share information. The language basically helps the equipment talk to each other, like describing what job each piece of equipment should do. This makes it easier for people who design and maintain these systems - they can just use BACnet to make sure everything works as it should.