Units of Memory

Units of Memory

4 bits                          =          1 nibble
8 bits                          =          1 Byte
1024 Bytes                =          1 KiloByte
1024 KiloBytes         =          1 MegaByte
1024 MegaBytes      =          1 GigaByte
1024 GigaBytes        =          1 TeraByte
1024 TeraBytes        =          1 PetaByte
1024 PetaByte          =          1 ExaByte
1024 ExaByte           =          1 ZettaByte
1024 ZettaByte        =          1 YottaByte

bit=Binary digit     Byte=B              KiloByte=KB             MegaByte=MB     GigaByte=GB

TeraByte=TB            PetaByte=PB     ExaByte=EB     ZettaByte= ZB       YottaByte=YB 

BIT

Bit stands for binary digit. It uses only two symbols 0 and 1.

BYTE

The combination of 8 bits is called byte (1Byte = 8 bit). Byte is the smallest unit of data. Every type of data in computer science is measured in terms of byte.

CHARACTER

The symbol displayed on the VDU, when you press any key on the keyboard is called character. It may be any type of character such as alphabetic, numeric, or special character

WORD

The combination of character is called word. Sometime, a single character may be a word.

FIELD

The combination of word is called field. In other word, the smallest unit of the relation/table is called field, the vertical bar/column of any table is called field.

RECORD

The combination of related fields in a table is called record. The horizontal bar/row in a table is called record.

DATA

Everything in a computer system is collectively called data. From a simple character or word, to the complete letter, document, chart, picture, graphics etc are all an example of data. In other word, from a single field/record, to the combination of field/record etc. is called data.