What are these IBM 'thingys'

25 Oct 2010

On 10/25/10 7:26 PM, leaknoil wrote:
...
  It looks to me like a punch card exactly fits in there
and the contacts are what read the holes in the card. 
nope

cards are read with 12 brushes

they appear to be the cover connectors for interconnecting cables

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What are these IBM 'thingys'