Ranges specify rectangles of various shapes in the spreadsheet, just
as ranges do in traditional spreadsheets. Exmples of legitimate
ranges: 

\begin{itemize}

\item \textbf{*} - all rows, all columns 
\item \textbf{B*} - all rows in column B 
\item \textbf{*5} - all columns in row 5 
\item \textbf{C5..F25} - all cells in the rectangle between C5 and F25

\end{itemize}

Many functions accept ranges. For example, \&SUM(``d*'') will add 
up all cells in column d.