Types of MemoriesAuthor : Pandu Ranga Rao N
E - Mail : pandu2050@gmail.com

We are all human beings. We have got extraordinary power to remember and forget things. We also recognize things. All these functions are performed by our brain. Brain has got special neurological cells to store what we see, listen and think, temporarily or permanently.

Whenever we start talking about the computers, we come across the term computer memory. The computer memory also is like memory cells in our brain. However, we classify computer memory in terms of its storing capabilities. Since it is manmade, it requires different types of memory for storing, executing programs and for performing computations.

Basic memory types :

Basically, there are two types of memories co-exists in the world of computers. They are Random Access Memory and Read Only Memory. The Random Access Memory is used for storing programs, data etc. when the computer is powered ON. The Read Only Memory is a memory where the programs and data won’t get erased, even if we switch off our computer system. Both RAM and ROM are in the form of IC chips (Integrated Circuit chips). Out of it, RAM is volatile form of memory and whereas ROM is of Non volatile form.

Types of RAM :

According to technical usual terminology, the RAM has got two types. One is the static and the other one is the dynamic RAM. Static RAM is made of flip-flops. Static RAM’s are expensive to produce, but, is quite faster than Dynamic RAM. Static RAM is used as a cache memory. Dynamic RAM on the other hand made out of transistors and capacitors. Single capacitor and a single transistor pairing form a memory cell. Basically, Dynamic RAM is used as the main memory in computer system.

ROM types :

Now, let us see about the ROM types. In ROM category, we find three types. The ROM itself, EPROM (Erasable Programmable Read Only Memory), EEPROM (Electrically Erasable Programmable Read Only Memory). While ROM is non-erasable, its other two variants are erasable. Some special hardware is needed to erase and rewrite data in EPROM and EEPROM. The ROM is normally used to store startup routines such as Hardware testing routines, RAM testing routines and BIOS routines.

Age of CD's DVD's USB drives : openning a new chapter in computer storage device history

The competence and advancement of technology has caused a hot wave in computer science history. Within a short span, it has grown to such an extent that, today we are witnessing CD’s, DVD’s, Blu-Rays, USB drives and MicroSD cards. The last two are the combo’s of both RAM and ROM.

The MicroSD card and USB drives uses memory chips to store the data. It makes use of compressing mechanism to store more data. The data stored in EPROM’s. EPROM’s enable one to erase the data and also maintain data while not connected to power source or to a working computer system.

The types specify the actual uses of memory. It classifies and breaks memory management into many categories. This will help one to do research and development activity by choosing specific category.

Author : Pandu Ranga Rao N
E - Mail : pandu2050@gmail.com
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