As we will see, all memory technologies use a single paradigm that is known as
fetch-store. For now, it is only important to understand that there are two basic operations
associated with the paradigm: fetching a value from the memory or storing a value
into the memory. The fetch operation is sometimes called read or load, and the store
operation is sometimes called write. When we discuss I/O, we will understand how the
fetch-store paradigm is implemented and how memory access is related to I/O.