FEATURED CONTENTFor the latest blog, photos and featured links, click here! RECENT ARTICLESFor the most recent longer-format blog essays, click here! Main Content Consulting Services Media Blog About Featured Featured Links New Photos Latest Articles Shades of Things to Come 4 The Bitcoin Fairy Rollback The Climate Change Blog Airplane! About Mark Widmer Mark is chief of computer and IT service provider, Mark Widmer Computing, an occasional lecturer, and is working on some great new books. Welcome to the site.