Question

What is a spreadsheet used for?

Answer 1

http://www.ehow.com/about_5212599_uses-spreadsheets.html

http://en.wikipedia.org/wiki/Spreadsheet

Answer 2

Thanks, another question...

are all column vertical and all rows horizontal?

Answer 3

Yes.

http://spreadsheets.about.com/od/c/g/Column_defined.htm