What is Computer Memory and What are Different Types?

UNIT 3 

MEMORY SYSTEM (index)

3.0 Introduction
3.1 Objectives

3.2 Memory Types and Storage Devices
    3.2.1 Semiconductor (Main) Memory
    3.2.2 Magnetic Memory
    3.2.3 Optical Memory

3.3 Memory Hierarchy & their Needs

3.4 Summary
3.5 Answers to Check Your Progress