The term ‘Computer’ is derived from a Latin word “computare” which means to “to calculate”, “to count”, “to sum up” or “to think together”. So, more precisely the word computer means a “device that performs computation“.
It is like something written on sand which is temporary and would be erased.
It is like something written on stone that cannot be removed or changed once written.
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It is temporary memory, also called volatile memory.
It is permanent storage devise and data remains safe on ROM even when computer is off also called non-volatile memory.
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RAM stores information which is currently processed by computer. When power off, it loses all the information. Data can be read, stored, modified or delete from the RAM.
It contains information related to computer startup process which is written at the time of memory manufacturing
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volatile memory
non-volatile memory
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It is a high-speed memory.
It is much slower than the RAM.
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Large size with higher capacity. 1 to 256 GB per chip
Small size with less capacity. 4 to 8 MB per chip
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Types: Static RAM, Dynamic RAM
Types: Programmable ROM (PROM), Erasable Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), Mask ROM,
A hardware device which can be used to store digital data and applications which may be in the form of images, video, audio, etc. is called a storage device.
It is a key component of a computer and the hard drive is one of its examples.
There are two types of storage devices used with computers: a primary storage device, such as RAM, and a secondary storage device, such as a hard drive.
