My paid job is doing tech-support work and I often have to convey information to users over the phone. To make sure we’re on the same page with spellings, I use the NATO phonetic alphabet. But, I can never remember certain letters. One solution would be to just remember the NATO alphabet. Or, I could just write a Firefox extension that lets you select text, click on “Show NATO Phonetics” in the context menu, and get a popup of the phonetics for the selected text.