Digital audio broadcasting (DAB) allows for more radio stations to be broadcast due to signals taking up less airwave space. Listeners can access all of their favorite stations as well as digital-only options. DAB offers a variety of music, talk, local, and specialty stations to explore along with live sports broadcasts. Satellite radio also provides numerous commercial-free music and talk stations nationwide via subscription. Podcasts are episodic digital audio files that can be downloaded or streamed online, while internet radio streams audio continuously online without the ability to pause or rewind like downloaded podcasts.

2. Digital signals take up less space on the airwaves, so there are more
stations to choose from, 24 hours a day. You'll find all your favourite
stations on DAB, plus many more that are digital only. There are
plenty of spoken word, sport, music, and local and specialist stations
to discover, and you can even listen to Premier League football
matches, live.
DIGITAL AUDIO BROADCASTING. (DAB)

3. » TERRESTRIAL/ SATELLITE RADIO
Terrestrial Radio is a digital cell phone system for military,
police and ambulances. Commercial services such as World
Space offer encrypted digital satellite radio. Satellite radio is
a radio service broadcast from satellites primarily to cars,
with the signal broadcast nationwide, across a much wider
geographical area than terrestrial radio stations It is
available by subscription, mostly commercial free, and offers
subscribers more stations and a wider variety of
programming options than terrestrial radio.

4. NON BROADCAST PRODUCTS

5. PODCASTS
podcast is a digital medium consisting of an episodic series of audio,
digital radio, PDF, or files subscribed to and downloaded through
web syndication or streamed online to a computer or mobile device.
derived from "broadcast" and "pod" from the success of the iPod, as
audio podcasts are often listened to on portable media players.
http://www.bbc.co.uk/podcasts

6. INTERNET RADIO
Internet radio (also web radio, net radio, streaming radio, e-
radio, online radio, webcasting) is an audio service transmitted
via the Internet. Broadcasting on the Internet is usually referred
to as webcasting since it is not transmitted broadly through
wireless means.
Internet radio involves streaming media, presenting listeners
with a continuous stream of audio that typically cannot be
paused or replayed.Internet radio is also distinct from
podcasting, which involves downloading rather than streaming.