0.  "[a-z](command) stores into the buffer you specify.
      "[a-z](command) uses the data in the buffer you specify.
      "1pu.u.u... goes through the history of the edits.
      :ab "name" William Kevin Earls\n (abbreviation of my name insert
        name<space> and my name will appear.
      '' returns to the last line changed.

  1.  :!command  executes a unix system command.
 
      Some useful examples are:
          :!ls  -  shows a directory listing of your area.
          :!rm FILENAME  -  removes file FILENAME from your area.
 
  2.  :w FILENAME  writes the current vi file to disk with name FILENAME.
 
  3.  :#,# FILENAME  saves the lines # through # in file FILENAME.
 
  4.  :w >> FILENAME  appends current file to file FILENAME.
 
  5.  :r FILENAME  retrieves disk file FILENAME and inserts it into the
      current file following the cursor position.
 
  6.  :r!command  executes a unix command and places the output after the line
      with the cursor.
 
  7.  !<movement>command passes the text indicated by the movement command
      through a Unix command.  Example: !}sort
 
      To process a single line use: !!command
 
      To process the entire file: :%!command
 
  8.  mx establishes a text marker x (could be a to z).  One can then return to
      the line with that marker with the command: 'x.
 
  1. ^D  moves down 1/2 page in the file.
     ^U  moves up   1/2 page in the file.
 
  2. ^F  moves down 1   page in the file.
     ^B  moves up   1   page in the file.
 
  1. Ctrl-g  displays your location in the file and the file status.
     Shift-G  moves to the end of the file.  A line number followed
     by  Shift-G  moves to that line number.
 
  2. Typing  /  followed by a phrase searches FORWARD for the phrase.
     Typing  ?  followed by a phrase searches BACKWARD for the phrase.
     After a search type  n  to find the next occurrence in the same direction
     or  Shift-N  to search in the opposite direction.
 
     Watch out for the special characters used in Unix regular expressions:
     /\^$.*[]  To turn off the special meaning of these characters :set nomagic
 
  3. Typing  %  while the cursor is on a  (,),[,],{, or }  locates its matching
     pair.  To show the matches as text is typed in: :set showmatch
 
  4. To substitute new for the first old on a line type    :s/old/new
     To substitute new for all 'old's on a line type       :s/old/new/g
     To substitute phrases between two line #'s type       :#,#s/old/new/g
     To substitute all occurrences in the file type        :%s/old/new/g
     To ask for confirmation each time add 'c'             :%s/old/new/gc

      ^L  - refresh the screen
      ^Q  - to restart a session stopped by ^S
      ^Z  - suspends vi and returns to shell prompt; to return to vi: fg
      xp  - reverse two characters
    deep  - reverse two words (start at the space in front of first word)
       J  - join 2 lines
       B  - same as b but ignores all characters except blanks, tabs, and
            newlines in finding start of previous word.
       E  - same relation to e as B to b.
       W  - same relation to w as B to b.
       ~  - reverse case
      :vi - return to vi from ex : prompt
      :ab - define an insert mode abbreviation
      >>  - shift line "shiftwidth" characters to the right.
      <<  - shift line "shiftwidth" characters to the left.
      ''  - return to last created marker or text change location.

^F (^B) pages forward (backward)             ^D (^U) half pages down (up)
h j k l moves the cursor left down up right  G (1G) goes to end (top) of file
w (b) moves to next (previous) word          e moves to next end of word
0 ($) puts cursor at start (end) of line     ^ moves to first nonblank on line
+ moves to first nonblank on next line       n| moves to column n on line
- same as + but to previous line             ma sets position marker "a"
{ (}) moves cursor before (after) paragraph  `a returns to marker "a"
/pattern searches forward for pattern        'a returns to front of line w/ "a"
?pattern searches backward for pattern       '' returns to last marker/change
n (N) redo / ? in same (reverse) direction   ^E to move screen up   1 line
% shows matching () {} []                    ^Y to move screen down 1 line