Get your Cocoa app to recognize verbs, nouns, or even people and company names using NSLinguisticTagger. Listen to what other cool stuff that this nifty yet lesser known class can do for you.
Sound Code: Subliminal Data Transmission through Audio Waves
Have you heard of sound code? It may be the next big breakthrough in marketing and online commerce. It could also be an exotic technology only applicable to a few very specific set of industries.