Capter 1 Introduction -- 1.1 Properties of Information -- 1.2 Levels of Information -- 1.3 Information Media -- 1.4 Reversible and Irreversible Processes -- I -- Capter 2 Noiseless Channels -- 3 Coding for Noiseless Channels -- 4 Joint Events, Natural Languages -- 5 Noisy Channel -- 6 Error Checking and Correcting Codes -- II -- 7 Properties of Continuous Channels -- Capter 8 Detection of Continuous Signals -- 9 Information Filters -- References -- Appendix A Fourier Transform and Related Concepts -- Appendix B Binary logarithms and Entropies -- Appendix C Problems.