from 25 hours to 12 minutes on a 128 by 128 core array.

Smaller cores made the use of hollow needles impractical, but there were numerous advances in semi-automatic core threading. Support nests with guide channels were developed. Cores were permanently bonded to a backing sheet "patch" that supported them during manufacture and later use. Threading needles were butt welded to the wires; the needle and wire diameters were the same, and efforts were made to eliminate the use of needles.

The

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