Greek Letter - Delta

Delta Nile River Delta

Delta - wikipedia.org
A river delta is named after the letter delta because it has roughly the triangular shape of the upper-case delta.
en.wikipedia.org/wiki/Delta_%28letter%29

© 1993 - 2010 George F Sutton, Symbols.Net
Wow, 17 long years....
What do you all loyal visitors think should be the next big step????