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"Magnetic-Tape Write-Enable Rings": These rings were found in the mag tape reels to enable writing and then were removed after writing before sending the software to it's destination. I collected my set in the mid-'80s when I was working with PDP-11s running IAS. For extra points find and read a copy of "The Emerging Social Significance of the Magnetic-Tape Write-Enable Ring", ACM SIGSOFT Software Engineering Notes, Volume 10, Number 2, April 1985, page 47. This image was photographed at home in Gouldsboro, Maine for Flickr Friday "Circles".
隨機精選照片
