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Circuits/arithmetic units

• introduciton
• circuits
• precognitions
  • IC
  • transistor
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  • reflow-solderring
  • SMD
• history of IBM
• circuits in SLT
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• memory in MST
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• And after that?
  • today
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• tape recorder
  • IBM 2310
  • IBM 1316
• arithmetic units
  • arithmetic units
  • relay
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tape recorder

IBM 2310 Removable Cartridge Drive

Harddisks - everybody knows them. The exhibit you see, named IBM 2310 Removable Cartridge Drive, is one of the first hard disk drives in the world. It was normally used for so called "small systems".
Furthermore, it was also the first hard drive that inherents an appropriate price-performance ration. This hard drive was a revolutionary product. In the late 50s the capacity of 1 MB was enormously huge!

If somebody wanted to use the disk, he had to pay 3.200$ per month for only 350 MB, believe it or not. Six of these disks could be merged into a vertically rack, called „IBM 1316 DiskPack“. It was advertised as an „small and portable“ system. This sounds funny today, but in 1956 it was true!

IBM 2310 removable cartridge drive