Representation of information

Data – It is meaningless and is raw fact as number, character etc. like count of items sold.

Information – It is meaningful and processed data like which product sells most.

Binary Number System – It uses two symbols to represent data, i.e. 0 and 1 and its base is 2.

Memory Size (Bit, Byte, KB, MB) –

Unit	Equals		Unit	Equals
1 Bit	0 or 1		1 KB	1024 bytes
1 Nibble	4 bits		1 MB	1024 KB
1 Byte	8 bits		1 GB	1024 MB

ASCII – Computer stores data in a coded form usually the American standard code for information technology (ASCII) is used, which can represent 256 different symbols by using 8 bits.