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.
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