copy and paste in VIM

VIM have multiple clipboard which allows you copy and save different content at the same time. The register can be any of {a-zA-Z0-9.%#:-"}. It is really interesting thing which I never notice before.

"{a-zA-Z0-9.%#:-"}   Use register {a-zA-Z0-9.%#:-"} for next delete, yank
                  or put (use uppercase character to append with
                  delete and yank) ({.%#:} only work with put).

:reg[isters]         Display the contents of all numbered and named
                  registers.  {not in Vi}

:reg[isters] {arg}   Display the contents of the numbered and named
                  registers that are mentioned in {arg}.  For example:

["x]y{motion}        Yank {motion} text [into register x].  When no
                  characters are to be yanked (e.g., "y0" in column 1),
                  this is an error when 'cpoptions' includes the 'E'
                  flag.

["x]p                Put the text [from register x] after the cursor
                  [count] times.  {Vi: no count}

I forgot there is another register *, it is as same as the system clipboard. So you can yank some text into register *, it will be in the system clipboard also. :D