![Computer technicians working in a server room.](https://webarchive.library.unt.edu/web/20201218014945im_/https://www.energystar.gov/sites/default/files/assets/images/ATE-Article-15-Header.jpg)
SERT™ stands for Server Efficiency Rating Tool and it was developed by SPEC® in collaboration with the U.S. Environmental Protection Agency. It collects measurements and uses an accompanying efficiency metric to assess computer server energy efficiency for ENERGY STAR certification.