Engineering

• Engineers Edge
  Design and engineering resources, featuring a variety of online calculators, definitions, etc. 

• eFunda

  Short for Engineering Fundamentals, it provides a variety of information to aid in the solution of complex design problems. An extremely useful engineering reference source. 

• Engineering Technology Site

  Technical information for engineers and links to sources of engineering information. 

• Engineering Timelines

  An interactive map of British engineering history. It is searchable by name of item, category, date, engineer, location (including OS grid reference) or other keyword. A substantial amount of information is given for each engineering work included. It's still being expanded, so expect more to be added. 

• EngineersToolbox

  The EngineersToolbox is a freely-available collection of advanced online computational and reference modules for professional and student engineers. 

• National Physical Laboratory (NPL)

  The National Physical Laboratory is the United Kingdom's national standards laboratory, which acts as the UK authority for physical measurement standards and metrology (the science of measurement). 

• Online CPD

  A collection of interactive multimedia resources, reference information and collaborative communication systems designed to help engineers with their Continuing Professional Development (CPD).