what is RAM ?

What is RAM ?
Discuss in detail about RAM ?
What are different types of RAM ?
Write a short notes on RAM ?

RAM: - Primary memory is one of the types of RAM (Random Access Memory) it is called as RAM because the access time is same for all locations. Computer software programs that are being written or pre designed programs loaded from disk or tape are stored in the RAM of the computer.
It provides the processor with temporary storage for programs and data. All I/O including programs must enter and exit primary memory i.e. RAM. It is possible to read from and write to locations within the RAM. Here are the user can store and retrieve information. That’s why it is called as volatile memory.

RAM is measured in KB or MB

1 KB equals to 1024 bytes
1 MB equals to 1024 KB
1 GB equals to 1024 MB
1 TB equal to 1024 GB

The capacity or RAM in micro computer depends on the number of memory chips installed.
The types of RAM are SRAM (Static RAM) and SRAM (Static RAM)

ROM (Read Only Memory): - It is a non volatile memory i.e. when the computer is switched off the data on this chip is not lost.
That is certain essential functions that the computer must perform when it is switched on like connections have to be established within the various components of computer. A series of micro programs are required to perform these low level functions, these programs are stored on the ROM at the manufacturing time of the computer.
Types of ROM are: - PROM (Programmable ROM)
EPROM (Erasable PROM)
EEPROM (Electrically Erasable PROM) it is also known as electrically Alterable PROM)