The second category: technology. Technical books, such as the inside story of Hadoop technology series. This kind of books mainly refers to system technology, how the system works when building a big data system, the design objectives, framework structure, applicable scenarios, working principles, operating mechanisms, realization functions and so on of each system component. This kind of book is suitable for technicians in IT systems department and development department. They need to understand the operating mechanism of the system, use the system to realize the application development of big data and optimize the operation and maintenance of the system.
The third category: application category. Books on application level, such as data mining technology, data analysis based on SPSS and so on. This kind of books mainly refers to the applied technology category, telling you how to apply tools and methods to extract useful information from massive data and solve practical business problems. This kind of books is suitable for business departments, marketing departments and people who are closely integrated with business. They pay more attention to solving business problems and build analysis and solutions around business problems.