Memory size refers to the amount of data that a computer or device can store and access at any given time. It is typically measured in bytes, with common units including kilobytes, megabytes, gigabytes, and terabytes. Larger memory sizes allow for more applications to run simultaneously and enable the storage of larger files, such as videos and high-resolution images. In computing, memory size can be categorized into two main types: RAM (Random Access Memory) and storage. RAM is used for temporary data storage while a device is in use, allowing for quick access and processing. In contrast, storage refers to long-term data retention, such as that found in hard drives or solid-state drives.