Hello, Professor Kim Young-han. It's been a while since I left a course review. I wanted to be a game client programmer who is good at graphics, but I started my career as an MMORPG server programmer. So I lacked knowledge and know-how related to networks, http, and web programming, or even if I did, I only heard about it somewhere. My major in college was not computer engineering, but a different field, and I didn't build a game server from scratch, so that was enough for me to build content on top of an existing foundation. Now, I have to deal with Spring at work. This roadmap was a huge help to me, who lacks basic knowledge. I even gained the confidence to create a service as a side project. If my product ever sees the light of day, I think more than half of it will be thanks to Professor Kim Young-han. Thank you.