http://www.stsci.edu/astroweb/astronomy.html

http://www2.ari.net/home/odenwald/cafe.html

http://www.kalmbach.com/astro/astronomy.html

http://idlastro.gsfc.nasa.gov/homepage.html

http://www.astronomy.com

http://www.astro.cf.ac.uk/Nam95

http://astrosun.tn.cornell.edu

http://www.einet.net/galaxy/science/astronomy.html

http://www.astronomyincorporated.com

Το Παρατηρητήριο της NASA

Άτλας του ανθρώπινου εγκεφάλου

http://www.accessexcellence.org

http://www.wayne.esu1.k12.ne.us/lessons/biology.html

http://www.hgmp.mrc.ac.uk/brochure/html

http://ariel.ucs.unimelb.edu.au/~cotton/mdi.htm

http://www.sciencenet.com.au

http://www.bocklabs.wisc.edu/welcome.html

http://www.ncbi.nlm.nih.gov

http://alpha2.bmc.uu.se/pdb

http://www.mednet.gr

http://www.appgeo.com

http://www-map.lib.umn.edu/history_of_cartography.html

http://www.mapquest.com

http://www-phys.llnl.gov

http://www.aip.org

http://www.cern.ch/Physics/HEP.html

http://physunserver.furman.edu

http://www.modelscience.com

http://www.chem.ucla.edu/chempointers.html

http://www.anachem.umu.se/eks/pointers.htm

http://www.rpi.edu/dept/chem/cheminfo/chemres.html

http://www.polychemistry.com

http://www.accta.com

http://www.csc.fi/lul/chem/graphics.html

http://www.jbc.org