No Memory abstraction OXFFF Operatin Device system in drivers in rOm ROM User program program User program Operating Operating system in system in RAM RAM 0 0 0 (b) Figure 3-1. Three simple ways of organizing memory with an operating system and one user process Tanenbaum, Modern Operating Systems 3 e, (c)2008 Prentice-Hall, Inc. All rights reserved. 0-13-6006639Figure 3-1. Three simple ways of organizing memory with an operating system and one user process. No Memory Abstraction Tanenbaum, Modern Operating Systems 3 e, (c) 2008 Prentice-Hall, Inc. All rights reserved. 0-13-6006639