{"id":372,"date":"2023-01-31T13:21:35","date_gmt":"2023-01-31T20:21:35","guid":{"rendered":"https:\/\/paultcottey.com\/Blog2021\/?p=372"},"modified":"2023-04-23T22:22:36","modified_gmt":"2023-04-24T05:22:36","slug":"if-you-know-what-these-are-you-are-old-part-22","status":"publish","type":"post","link":"https:\/\/paultcottey.com\/Blog2021\/2023\/01\/31\/if-you-know-what-these-are-you-are-old-part-22\/","title":{"rendered":"If you know what these are, you are old. Part 22."},"content":{"rendered":"\n

These date back to at least 1965. Some sources say as early as 1948 or 1954 though.<\/p>\n\n\n\n

They help<\/a> with encryption.<\/p>\n\n\n\n

They are subject to patent US3387396A<\/a>.<\/p>\n\n\n\n

They are groovy and fun to look at. Feeling old?<\/p>\n","protected":false},"excerpt":{"rendered":"

These date back to at least 1965. Some sources say as early as 1948 or 1954 though. They help with encryption. They are subject to patent US3387396A. They are groovy and fun to look at. Feeling old?<\/p>\n","protected":false},"author":1,"featured_media":373,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_s2mail":"","footnotes":""},"categories":[10],"tags":[11],"class_list":["post-372","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-you-may-be-old","tag-you-may-be-old","entry"],"yoast_head":"\nIf you know what these are, you are old. Part 22. - Paul T. 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