Ans: The Bourne shell is the standard shell of unix , it provides the following fewatures:
- It gives the ability of input/output redirection.
- Allows the usage of met characters for file name abbreviations.
- The environment can be customized using the shell variables.
- It provides the user with a built in command set for the creation of shell programs.
- Allows the user to control a job.

The Korn shell is an extension of the Bourne shell which is backward compatible. The feature unique to the Korn shell are as follows:
- Allows the user to do command line editing.
- It maintains a command history, which enables the user to check the last commands executed.
- There is a provision for integer arithmetic.
- Provides the support for arrays and arithmetic expressions.
- Give the user the option to use aliases which is used to abbreviate the command name.