The document discusses hardware components used in computer systems including input, processing, storage and output devices. It describes the functions of the central processing unit and memory for processing instructions and data. Secondary storage devices like magnetic tapes, disks and optical disks are described along with their access methods and storage capacities. A variety of input devices including keyboards, mice and scanners and output devices like monitors and printers are also summarized. Different types of computer systems are classified and factors for selecting and upgrading systems are outlined.

1. Hardware: Input, Processing, and Output Devices

5. Hardware Devices Analogy: A Paper-Based Office Secondary Storage Register Storage Output Primary Storage Input

6. Hardware Components Principles of Information Systems, Eighth Edition

8. Hardware Components in Action Principles of Information Systems, Eighth Edition Figure 3.2: Execution of an Instruction

13. Physical Characteristics of the CPU (continued) Principles of Information Systems, Eighth Edition Figure 3.3: Moore’s Law

15. Storage Capacity Principles of Information Systems, Eighth Edition Table 3.1: Computer Storage Units

16. Types of Memory Principles of Information Systems, Eighth Edition Figure 3.4: Basic Types of Memory Chips

17. Types of Memory (Cash Memory) Principles of Information Systems, Eighth Edition Figure 3.5: Cache Memory