The magnetic disks and drums are like recirculating shift registers because.
The magnetic disks and drums are like recirculating shift registers because Stored data is available for reading over and over again in the same order.\
A magnetic drum is a magnetic storage device used in many early computers as the main working memory, similar to how modern computers use random access memory (RAM) cards. In some cases, magnetic drum memory was also used for secondary storage. It is basically a metal cylinder that is coated with a magnetic iron-oxide material where the changing magnetic polarities are used to store data on its surface, similar to how modern disk drives use magnetism to store and retrieve data.
Magnetic disks are coated with a magnetic material such as iron oxide. There are two types: hard disks made of rigid aluminum or glass, and removable diskettes made of flexible plastic. In 1956 the first magnetic hard drive (HD) was invented at
Computer data storage, often called storage or memory, is a technology consisting of computer components and recording media that are used to retain digital data. It is a core function and fundamental component of computers.