viper-mode

viper-mode is a variable defined in `viper.el'.
Its value is

nil

Documentation:
To Viperize or not to Viperize.
If t, viperize Emacs. If nil -- don't. If `ask', ask the user.
This variable is used primarily when Viper is being loaded.

Must be set in your init file before Viper is loaded.
DO NOT set this variable interactively, unless you are using the customization
widget.

You can customize this variable.