A "blog" item is an item posted on my web site:
http://frequencyresearch.org

The is formerly http://jeffsutherland.com/complementary/ which still works. However it was convenient to give it a unique URL.

I use Google's Blogger site to generate postings. Since Google is starting up groups that do not have offensive ads like Yahoo, it is convenient to have them automatically post to the Google group for individuals who want to receive them when they are posted.