I've previously checked out big, old servers -- but this one is quite different.
HP 9000 K-class service manual (PDF): http://ftp.parisc-linux.org/docs/platforms/A2375-90004.pdf
Sources:
HP9000 K-class CPU board photo: https://commons.wikimedia.org/wiki/File:HP-HP9000-K-Class-CPU-PA-RISC8200-200MHz-A3641-60022_02.jpg
HP PowerTrust UPS: http://www.hpmuseum.net/display_item.php?hw=1078
HP ThinLAN AUI transceiver photo: https://4gte.com/products/hp-agilent-26841b-thinlan-transceiver/
Modem Distribution Panel photo: https://www.ebay.com/p/1000238970
HP 9000 Workstation with graphics display photo: https://commons.wikimedia.org/wiki/File:HP-HP9000-710-Workstation_04.jpg
HP-UX CD photo: https://archive.org/details/hp-ux8.07forhp9000s7xx
IBM RS/6000 server photo: https://en.wikipedia.org/wiki/File:IBM_RS6000_h70.jpg
IBM POWER CPU card photo: https://commons.wikimedia.org/wiki/File:Power-cpu.jpg
Sun SPARC CPU photo: https://commons.wikimedia.org/wiki/File:Sun_UltraSPARCII.jpg
Sun E450 photo: https://imgur.com/gallery/5W4gGef
HP 9000 series workstation running Debian Linux photo: https://commons.wikimedia.org/wiki/File:HP-HP9000-C110-Workstation_21.jpg
HP 9000 series workstation running NeXTSTEP photo: https://commons.wikimedia.org/wiki/File:HP-HP9000-715-Running-NeXTSTEP_02.jpg
HP press release from early 1997 with list prices: https://engineering.purdue.edu/ECN/Support/KB/Docs/HpMain/kclass.txt
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