Regular Expressions. The Matrix, the metrics that we use to measure the amount of error. Mean absolute error like Rmse. My questions are conceptual. I say that if ever in the future, you go to a company and they give you a Excel file, which has a column of the textual. How you can convert it into numerical values. You should be able to know that to answer that questions as a data scientist. Or bit later analyzer. Or analyzes expert which of the following does not describe it and metal to deal with yet. So this is just the topics which are related to those columns, The Columns of the housings are important. How we can build new columns. How what is the functionality of a computer either explain in the lab? So the functionality of a computer is related to Feeling the missing values, how we can make the normalization, how we can add the new attribute. How we can do that method, really?