Dersch is part of a growing community of vintage computer collectors who are preserving the classic machines that helped launch the digital revolution. “The enthusiasm for the history of computers and all the stuff around it is growing,” said Erik Klein, president of the Vintage Computer Federation, which organizes an annual festival at the Computer History Museum in Mountain View in the heart of Silicon Valley. Now Klein channels his passion for vintage computers into organizing festivals, repair workshops, swap meets and other events as president of the Vintage Computer Federation.