These blogs are the continuation of bdslog that I wrote for a while, hosted over at Blogger. I have decided to divide the blog into four sections, listed in the menu on the left. I have carried forward a few of the entries from bdslog, but mostly I have left the old posts where they were and anybody interested can view them there. I have not included facilities for readers to comment, because so few readers did on bdslog, but I shall open these blogs for comment if so requested.