• a multitude of flags/settings   (see :set all for details)

• ability to re-map keystrokes   (e.g. map # :w:!ispell -x %:e!)

• abbreviations   (e.g. ab SYN synchronised)

• multiple change-save buffers   (e.g. "ayy "ap)

• etc. etc. etc.

For further details:

• The VI Pages   (http://www.math.fu-berlin.de/~guckes/vi/)

• VI Lover's Home Page   (http://www.thomer.com/thomer/vi/vi.html)

• vim Colour Editor   (http://www.linuxdoc.org/HOWTO/Vim-HOWTO-9.html)