- A data compression technique, which reverts an exact copy of original file.

- Lossless Source Coding is used for compressing text files in modems.

- Lossless Source Coding is a building block for designing lossy compressors.

- Lossy compression is implemented for images, sound and video files for effective data compression.

- Many compression techniques have a lossless mode.

- The lossless source coding involves a sequence of fixed length symbols.

- Each of these symbols is easily manipulated independently.