The document discusses the four main parts of a computer system: hardware, software, data, and users. It describes the essential hardware components, including processing devices like the CPU and secondary processors, memory devices like RAM and ROM, and input/output and storage devices. It also explains the two types of software - system software like the operating system, and application software. The document notes that data is stored using binary numbers and can be organized into files, and that computer users oversee tasks like system setup, software installation, and file management.

1. McGraw-Hill Technology Education Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.

2. Chapter 1B Looking Inside the Computer System

17. Chapter 1B End of Chapter