References
- Groupware, http://en.wikipedia.org/wiki/Groupware
- UC, http://www.microsoft.com/uc
- 사무관리규정, http://www.mogaha.go.kr
- SMTP, http://www.ietf.org/
- LDAP, http://www.ietf.org/
- 웹 서비스, http://www.w3.org/2002/ws/
- Worldwide Collaborative Applications 2007-2011 Forecast: A First Look at the Numbers, http://www. idc.com