1. 1. Moore's Law developer .intel.com/solutions/archive/issue2/ feature.htm.
2. 2. History of the World Wide Web . www.w3.org/History.html.
3. 3. E Coiera .Guide to Medical Informatics, the Internet and Telemedicine. London: Chapman & Hall Medical, 1997 .
4. 4. PubMed . www.ncbi.nlm.nih.gov/PubMed./.
5. 5. National Library of Medicine . www.nlm.nih.gov.