\begin{verbatim}
 ----------------------------------------------------
             |                   |                  |
 strength    | standard          |                  |
 of email    | modular,extensible|                  |
             |                   |                  |
 ----------------------------------------------------
             | big data transfer |                  |
 weaknesses  | too big for phone |                  |
 of email    |                   | spam             |
             |                   |                  |
 ----------------------------------------------------
             |                   |                  |
             | opportunities of  | threats of       |
             | market            | market           |
             |                   |                  |
\end{verbatim}