The NATO phonetic alphabet, also known as the NATO spelling alphabet, is the most widely used spelling alphabet. Basically it is used to spell a given word or sentence to avoid as much ambiguation in pronunciation of the word.
Phonetic is a simple Dashboard widget that provides easy access to the NATO spelling alphabet.
To install the Phonetic widget, when the download is complete, unarchive it and place it in /Library/Widgets/ in your home folder. Show Dashboard, click the Plus sign to display the Widget Bar and click the widget’s icon in the Widget Bar to open it.
To learn more about dealing with the Mac OS X Dashboard you can easily access the Apple support page HERE.