I was too lazy to post a new article on this website. Once I skip a posting, it makes my lazy. Since August, I have been in the academic trip season, and it becomes difficult for me to make articles for the website. While I am writing papers, it is easy for me to write an article for the website because I am stuck in writing my own papers. 
This article shows a map of programming languages. From this map, we can see relations among languages.
