chapter 1 Discrete Time-Space Models -- chapter 2 Steady State Discrete Models -- chapter 3 Poisson Equation Models -- chapter 4 Nonlinear and 3D Models -- chapter 5 Epidemics, Images and Money -- chapter 6 High Performance Computing -- chapter 7 Message Passing Interface -- chapter 8 Classical Methods for Ax = d -- chapter 9 Krylov Methods for Ax = d.