By the early 1960s, work on different implementations of the computer utility vision had begun at various places. As we have seen in the previous pages, the Cambridge, Mass., area was particularly active, initially because of the influence of John McCarthy. These developments were tracked for a short period by Lewis Clapp, in the "Time-Sharing System Scorecard." The last of these, published in Fall 1967, clearly shows the proliferation of systems that had occurred in the few years since Corbat? demonstrated the first version of CTSS.