 So, welcome to Geotechnical Engineering 1. I am D.N. Singh, Institute Chair Professor at IIT Bombay, Department of Civil Engineering. I am known as the D.N.S. When I used to study this course as an undergraduate student way back in 1985 and since then what I have observed is that the course has evolved a lot. People call this course very mundane because they have to deal with soils, rocks, groundwater and they have to study the mechanics of these materials. What I have realized is based on my professional experience in the recent past that the things have changed considerably and in present day situation or the circumstances the requirements are that students and the professionals should be knowing very well how to manipulate the materials to use them for the proper purpose. And with this intention I thought of offering this course in a very conventional manner. You will find that I would be using mostly the blackboard to teach this course and I will be emphasizing more on what is the deviation which has occurred in the recent past from the conventional subject which all of us were taught long back. I would recommend that undergraduate students and the people who are in the professional practices should go through the contents of this course and I hope they will find this very contemporary and giving them a complete picture of what is in store for them soils as a geomaterial and how to practice this subject in the real life. Thank you very much.