Memory of a Computer is any physical device which is capable of storing information whether it is large or small and stores ite temporarily or permanently.

RAM(Random Access Memory) is a type of volatile memory that stores informaiton for a short interval of time. EPROM(Erasable Programmable ROM) is a non-volatile memory.

Memory can be either volatile or non-volatile. Volatile memory is a type of memeory that loses its contents when the computer or hardware deice is switched off.

Units of Memory

A computer processor is made up of multiple decisive circuits, each one of which may be either OFF or ON. These two states in terms of memory are represented by a 0 or 1. In order to count higher than 1, such bits (Binary digitS) are suspended together.

1 byte = 8 bits
1 byte -> (00_000_000 to 11_111_111)

Types of various Units of Memory

• Byte -> abbreviation is B
• Kilo Byte -> 1024 bytes (2^10) -> abbreviation: K or KB
• Mega Byte -> 1_048_576 bytes (1024^2) -> abbreviation: MB
• Giga Byte -> 1_073_741_824 bytes (1024^3) -> abbreviation: GB
• Tera Byte -> 1_099_511_627_776 bytes (1024 GB) -> abbreviation: TB
• Peta Byte -> 1_125_899_906_842_624 bytes (1024 TB) -> abbreviation: PB
• Exa Byte -> 1_152_921_504_606_846_976 bytes (1024 PB) -> abbreviation: EB
• Zetta Byte -> 1_180_591_620_717_411_303_424 bytes (1024 EB) -> abbreviation: ZB
• Yotta Byte -> 1_208_925_819_614_629_174_706_176 bytes (1024 ZB) -> abbreviation: YB

Note: Not confuse these two:

• 12800 KB RAM refers to the amount of main memory the computer provides to its CPU.
• 128 MB disk symbolizes the amount of space that is available for the storage of files, data, and other type of permanent information.

Reference

https://www.geeksforgeeks.org/understanding-file-sizes-bytes-kb-mb-gb-tb-pb-eb-zb-yb/