chapter 1 Preliminaries -- chapter 2 Statistical life length distributions -- chapter 3 Reliability of various arrangements of units -- chapter 4 Reliability of a one-unit repairable system -- chapter 5 Reliability of a two-unit repairable system -- chapter 6 Continuous-time Markov chains -- chapter 7 First passage time for systems reliability -- chapter 8 Embedded Markov chains and systems reliability -- chapter 9 Integral equations in reliability theory.