From COBOL to Modern Programming Languages About 26 years ago, I learnt COBOL using the book 《COBOL 语言》（上、下册） by 谭浩强 (Tan Haoqiang). Here is a portion of my transcript. At the time, I developed a simple MIS (Management Information System) using COBOL. It was one of the programming languages I worked with early in my career. Since then, I never really had the opportunity to work with COBOL professionally.

Yesterday, I clicked a button in one web page, no response from that. I thought it must be something wrong. I opened browser console and noticed there is an icon. It turned out be a copilot icon after reading the logs in console. Nowadays, copilot almost is everywhere, office suite, vscode, visual studio, windows and edge browser. Never thought it is embedded in browse web console.