The key issues in run-time organization Data representation how should we represent the values of each source-language type in the target machine? Expression evaluation: How should we organize the evaluation of expressions, taking care of intermediate results? I Storage allocation How should we organize storage for variables, taking into account the different lifetimes of global, local and heap variables? I Routines: How should we implement procedures, functions and parameters in terms of low-level routines? Run-time organization for object-oriented languages: How should we represent objects and methods?The key issues in run-time organization l Data representation: How should we represent the values of each source-language type in the target machine? Expression evaluation: How should we organize the evaluation of expressions, taking care of intermediate results? l Storage allocation: How should we organize storage for variables, taking into account the different lifetimes of global, local and heap variables? l Routines: How should we implement procedures, functions, and parameters, in terms of low-level routines? Run-time organization for object-oriented languages: How should we represent objects and methods?