| Memory or computer information storage refers to | | | | In addition, there is also a third memory or tertiary |
| different types of computer device that maintain | | | | memory. This memory is much slower in contrast to |
| digital information used for computing. It is one of the | | | | the primary and secondary memory. Moreover, the |
| vital components, which makes the computer work. | | | | use of the tertiary memory was mainly for archival |
| Commonly, a computer is equipped with two types | | | | of rarely accessed information. This memory is usually |
| of memory respectively called primary memory and | | | | used for extremely large information stores. |
| secondary memory. Each of the memory has their | | | | Furthermore, it can store information without human |
| own method of storing information. | | | | operators. This device typically uses robotic |
| In the past, the primary memory is made of small | | | | mechanism, which will mount and dismount data from |
| magnetic ceramic rings that are threaded with wires. | | | | the archive. |
| This can store information through the polarity of the | | | | Furthermore, the performance of the storage device |
| magnetic field. The magnetic ceramic rings were used | | | | is measured through its latency. Usually, the unit of |
| up until silicon chips are used. These days, the main | | | | measurement for the main memory is nanosecond |
| memory is made of integrated circuits, which allows it | | | | and millisecond for the secondary memory. The raw |
| to store information. Moreover, the random access | | | | capacity of the primary and secondary memory also |
| memory can access any data and return it in a | | | | differs. The best accessibility characteristic for both |
| constant time. Furthermore, the main memory is small | | | | primary memory and secondary memory is random |
| and lightweight. However, this type of storage is | | | | access. This is due to that stored information in any |
| quite expensive. In addition, most of the main | | | | location can be accessed at any instant in just about |
| memory is volatile, which means that once there is | | | | the same time. |
| no power supplied to the memory, data will be lost. | | | | Overall, there are different type of storage device |
| On the other hand, the secondary memory is | | | | that a computer can make use of. These memory |
| different from the main memory. The secondary | | | | devices are extremely important for the computer to |
| storage is not directly accessible by the CPU. Usually, | | | | function. The computer memory has different |
| hard disk drives are used as the secondary memory | | | | characteristics. There are volatile and non-volatile |
| for modern computers. The speed of the hard drives | | | | memory devices. Moreover, the speed and |
| is much slower in contrast with the random access | | | | accessibility of the computer memory depends on its |
| memory. However, the secondary memory is | | | | capacity. Usually, the main memory is much faster |
| non-volatile, which makes it an ideal data-storing | | | | than other memory stores. Furthermore, these |
| device. The information that is stored in the hard | | | | memory stores are made to be energy efficient and |
| disks will not be lost even if there is no supplied | | | | can be recycled, which will make it much better for |
| power to the device. Moreover, hard disks are less | | | | the environment. |
| expensive than the primary memory. | | | | |