The CDC 7600 in its crate, just prior to leaving the site. The Siemens 7890 replaced the siemens 7880. The 7600 came to CERN back in 1972, and its twelve-year lifetime is somewhat unusual in computing circles, where the working lives of large machines frequently span just a few years. During more than 61,000 hours of total operation at CERN, the 7600 ran about 17 million jobs and read more than 1,250,000 tapes.