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  English Heritage exists to protect and promote England's spectacular historic environment and ensure that its past is researched and understood.
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• MathWorld
  
  dictionary encyclopedia eric erics math mathematics mathworld treasure trove weissteins world
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• PhysicsWeb Home Page
  
  PhysicsWeb, The web site for physicists, PhysicsWorld, Institute of Physics, Electronic Publishing, online products and services
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• SkyMap Software Home Page
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• timeanddate.com
  
  Current Time Worldwide (World Clock) and Calendars for countries worldwide both online and for printing. Find the best time for web meetings (meeting planner) or use the Time and Date Converters. Online services and Apps available for iPhone, iPad, and Android.
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• Unix System Admin handbook
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• WebElements periodic table of the elements
  
  atomic chart chemical chemistry element elements periodic periodicity science sheffield table web-elements webelements weight
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• Welsh Language course
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• Word Detective
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