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computer memory basics

computer memory


What is computer memory?

The CPU is called the brain of a computer, but while the human brain does a lot of work and protects our memories, the CPU only does arithmetic and logical calculations. Processes input data, process data cannot be protected because process data must now be stored in a safe place so that this task can be performed using computer memory (computer memory). Computer memory is divided into many small parts that we call cells. Each cell has a unique address or path. Whenever you save or save a file on a computer, it is saved in a cell -


There are two types of computer memory:

Variable - It is also called primary storage, also called primary storage. It is in direct contact with the CPU and its data and instructions are used quickly and directly by the CPU. This is called a variable memory because this memory cannot store any data permanently. Example - RAM
Non-volatile - This is known as secondary storage. It is used to permanently store a large amount of data, so the secondary storage is called storage. No storage examples - hard disk

There are four types of computer memory based on storage space -


  • Register memory
  • Cache memory
  • Main memory
  • Secondary storage

Computer storage device or unit - computer storage devices
Just as there are units such as seconds to measure time, decibels to measure noise, mm to measure distance, and grams to measure weight, units in the world of computers have been designed to measure memory capacity. Is it is called a unit or unit of computer memory -

The smallest unit of computer memory is a bit. A bit is a binary signal, ie a binary value of only 0 and 1, and when four bits are mixed, it is called a nibble. ) Means 1 nibble = 4-bit byte (byte) A group of 8 bits is called a byte.

When you type a number or letter into your computer, it is usually expressed as a byte or directly takes a space that corresponds to a byte. That is, 1 byte = 8 bits = 2 nibbles, so a group of about 11099511627776 weights is called terabytes, and about two million MP3s can be stored in one terabyte.
1 bit = 0, 1
4 bits = 1 nibble
8 bits = 1 byte
1000 bytes (bytes) = one kilobyte (KB)
1024 kilobytes (KB) = one megabyte (MB)
1024 megabytes (MB) = one gigabyte (GB)
1024 gigabytes (GB) = one terabyte (TB)
1024 terabytes (TB) = one pentite (PB)
1024 pedabytes (PB) = one exabyte (EB)
1024 exabytes (EB) = one zabyte (ZB)
1024 zetabytes (ZB) = one zetabyte (YB)
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