Hello. I am writing a review after completing the course of Mr. Ttaebae for about 3 months. I am a soldier who is about to be discharged after completing my second year of the Department of Electrical and Electronic Engineering at a 4-year university and enlisting in the military. Before I enlisted in the military, like most electronic engineering students, I had a goal of getting a job at a large company in a semiconductor process-related job. However, after I enlisted in the military, I had a lot of time to think on my own, and my main concern was my career path. When I suddenly thought, is it right for me to just get a job at a large company and do the same job and live a stable life? That is when I came across an interview with a startup CEO. While starting a business, he discovered a new value that he could create, and he was running towards that value with great passion. After watching that interview, I also developed a passion to become a person who can create something new and create my own value, even if it is not a business. When I asked myself what I should do to achieve that goal, I thought, ‘Let’s sow seeds in various fields.’ There were so many things I wanted to do, such as computer architecture, multi-core programming, operating systems, system programming, deep learning, machine learning, and processor design. However, since I was only interested in semiconductors before enlistment, I neglected the C programming language that I majored in, and I felt that I really lacked the basics for the things I wanted to do. So I decided to study C language again and while looking for a lecture that would solidify my basics, I came across Mr. Ttaebae. Mr. Ttaebae's lecture, which may seem long in some ways, is about the equivalent of a semester of university classes, and was the best choice for solidifying my basics. I also purchased the C Prime plus book and studied, and the fact that I could study this thick book thoroughly from beginning to end while completing the course, which would be difficult to read alone, is a huge merit of this lecture. (Both the lecture and the book are really great. They complement each other's lacking explanations.) Although the lectures are longer than other lectures, I have to invest more time, but learning by following the professor and solving practice problems makes me think that the time is actually efficient. In particular, when studying C language in the past, I had the hardest time with strings. By following and reviewing countless times in Mr. Ttaebae's lectures, I was able to understand the operating principles of strings, such as how buffers work and how to use input/output streams. Also, the Q&A community was a great help to me. Although I didn't leave many questions, I was able to study more than the lectures by looking at the questions left by other students in each lecture and reading the sincere answers from the teaching assistants to those questions. I think studying the questions that other students were curious about rather than thinking about them alone was a time when I could gain more. There seem to be a lot of programming-related courses these days. If someone were to choose a must-take course among them, I would definitely recommend Mr. Ttaebae. I plan to take Mr. Ttaebae++ because I want to learn more. I will take all the courses before returning to school and work hard to increase my value. Thank you to the professor who left me a great lecture that helped me move forward! Then, I will see you in Mr. Ttaebae++!