This document discusses cyber extension in agriculture. It defines cyber extension as an information exchange mechanism over cyber space through telecommunication means. It outlines some key milestones in cyber extension such as the establishment of ARIS in 1995 and Agrisnet in 1997 to provide agricultural information to farmers. The document also discusses various tools and approaches used in cyber extension like agriculture portals, email, video conferencing, expert systems, and call centers. It highlights advantages like lower costs and wider reach compared to traditional extension. However, it also notes challenges in cyber extension like low internet connectivity in rural areas and information not being available in local languages.