Chapter " panorama ": an overview of the concepts of computer system software (instructions and programs) hardware (physical elements of a computer) to understand the hierarchical computer system: onion type. From the information to the communication, the relationship between each layer from bottom to top. Next, I also learned abstract concepts learned in life everywhere abstract, more abstract understand the important role we play in learning and using the computer. There are four generations of commercial computer, the time interval between each generation is very short, and between each generation has a great leap forward. A brief history of the software at the same time, I understand how a computer software development, computer language to increase the number of layers, the use of more and more convenient.
Chapter XVIII "computing limits": In this chapter of the study, I learned that a computer calculation is limited, but also understand that people in order to break through the restrictions on the use of these methods. I studied precision, valid bit, underflow, overflow, represent (rounding) the concept of error of zero errors. While understanding the limitations limitation, communication components, covered three check code. Also learned that the software error is difficult to avoid, to understand the concept of "Big O analysis" and Turing machines.
Do 110 questions made me a headache and had to use some translation tools to assist when do question, by title, become more familiar with the textbook knowledge, but there are some things not very skilled, and even some topics can not find the answers in the textbook. Online search can not find