Welcome to Demo Course: Data Structure. My name is Md. Robel Mia and I am your instructor of this course. In addition to welcoming you to course, I would like to say that online courses provide a different away to study and place different skills from students. An online course is much like face-to-face course and you will be responsible for the same course material and the same standards of excellence that are required in the face to face course. Therefore, it takes a significant time commitment from you and remembers as an online learner, self-motivated and discipline are paramount. I am looking forward to an excellent session with you.