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.
