Booster LINACS have matured into an almost standard feature of many accelerator laboratories. Some LINACS are still young and growing, some mature ones prosper through continuous improvement while others require no further development. This overview will present a profile or the current population of booster LINACS. The accomplishments of the laboratories will be surveyed since the last HIAT along with their plans for future development. Those challenges, which the entire HIAT community have in common, will be identified to attract our enthusiasm and inventiveness. ©1999 American Institute of Physics.