... concurrently open files in a system Operating System Concepts – 7th Edition, Feb 11, 2005 A.43 Silberschatz, Galvin and Gagne ©2005 File -System Control Blocks Operating System Concepts – 7th Edition, ... functions through system calls Systems programs: use the kernel-supported system calls to provide useful functions, such as compilation and file manipulation Operating System Concepts – 7th Edition, ... Written in a high-level language Distributed in source form Provided powerful operating- system primitives on an inexpensive platform Small size, modular, clean design Operating System Concepts – 7th...