# Part II. Extensions and Clones

Part II describes various new features that extend the capabilities of vi and the availabilities of those features in four vi clones. This part contains the following chapters:

- Chapter 8, vi Clones Feature Summary

- Chapter 9, nvi--New vi

- Chapter 10, elvis

- Chapter 11, vim--vi Improved

- Chapter 12, vile--vi Like Emacs

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