When the subject of widespread EMP comes up, some folks blithely say: “We can just go back to vacuum tube technology”. But consider all the underlying technologies and metallurgy represented in this video produced by an electronics hobbyist in France: Hand Making Vacuum Tubes. (Thanks to Gaston for the link.)
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Bob G. mentioned this book excerpt: Books of The Times: ‘The Coming Famine’ by Julian Cribb
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L.H. spotted this: What NASA says you should keep on hand, for disasters. It all fits in a trash can. L.H. had this comment: “Not a bad list, just a little shy on depth.”