I have found Hacker News to be a very concentrated source of useful material, with a high ratio of "want to read / glad I read" articles. ... but nothing compa

I have found Hacker News to be a very concentrated source of useful material, with a high ratio of "want to read / glad I read" articles. ... but nothing compares, nothing has prepared me, for the sheer awesomeness, of these two links. I now must store the PDFs in a safe repository with GoogleCalendar note to re-read them frequently :->