Please answer the following question: I know that the answer to the question "Advanced Research Projects Agency refers to which acronym?" is in "In the 1970s, computer engineers at research institutions throughout the United States began to link their computers together using telecommunications technology. The effort was funded by ARPA (now DARPA), and the computer network that resulted was called the ARPANET. The technologies that made the Arpanet possible spread and evolved.". Can you tell me what it is?
A:
ARPA