Write Details About RAM, ROM and HDD?

RAM:

Full form of RAM is Random Access Memory. It is a volatile memory. We can read and write data in RAM. There are two types of RAM.

• Static RAM
• Dynamic RAM

ROM:

Full form of ROM is Read Only Memory. It is a non-volatile memory. Data access speed is lower than RAM. There are four types of ROM.

• PROM
• EPROM
• EEPROM
• UVPROM

HDD (Hard Disk):

A hard disk is a secondary device, where we can store our data. Its data capacity is very high. It makes by plotters. Cost of a hard disk is greater than a floppy disk.