In May 2008, the new CEO of Cyworld, a social network company in Korea, had to decide how to create and capture value from his rapidly growing user base. Cyworld was founded in 1999 and in 2003 it was acquired by SK Telecom, a leading mobile service provider in Korea. By 2007, Cyworld had 21 million users and $95 million revenue--$65 million from paid items (music, virtual gifts, etc.), $15 million from mobile networking, and $15 million from advertising. The new CEO had to decide which of these three revenue sources he should focus on in the future and how this choice would influence the target customers, the service offerings and the required capabilities.
- 2008 HBS
Choosing a Book Format
EPUB is the standard publishing format used by many e-book readers including iBooks, Easy Reader, VoiceDream Reader, etc. This is the most popular and widely used format.
DAISY format is used by GoRead, Read2Go and most Kurzweil devices.
Audio (MP3) format is used by audio only devices, such as iPod.
Braille format is used by Braille output devices.
DAISY Audio format works on DAISY compatible players such as Victor Reader Stream.
Accessible Word format can be unzipped and opened in any tool that supports .docx files.