Many information sites exist in the internet for the vi editor. The following three sites might be most relevant for beginning vi users:

1. An Introduction to Display Editing with Vi by William Joy and Mark Horton is a detailed introduction to the abilities of the vi editor
   
   
2. Vi Reference Manual by Keith Bostic is a very thorough reference manual to vi
   
   
3. Vi Lovers Home Page by Thomer M. Gil is the center of the vi universe
   
   
4. A quick reference card written by Y. Zhang can be downloaded here (pdf and ps formats)
   
   
5. Another quick reference (ps format) is available from KFA Juelich