What are numbers after title?

Occasionally, you will notice a number after the title of a post, such as:  Practice makes perfect? Or: That’s why they call it the practice of medicine. 0080 . The number 0080 is a code used to identify the document in Google documents. Almost everything in this blog is also included on Google documents, and is available for access by the public also. The Google documents version may be an updated version compared to what's on the website.