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Most of the S800 electronics is installed in two racks inside the cabinet seating on the top level of the S3 vault, right in the north side of the focal plane station chamber (see picture below). There is a total of six crates mounted in the two racks. The left rack contains a CAMAC crate on the top and two NIM crates, NIM crate 1 on the middle and NIM crate 2 on the bottom. The right rack includes a VME crate on the top, NIM crate 3 on the middle and NIM crate 4 on the bottom.