Charter Tech should like to thank the following organisations
for permitting the use of documents issued by their respective organisations on our website:

International Electrotechnical Committee
Geneva, Switzerland

Charter Tech should also like to thank the following organisations
 for permitting the use of images from their libraries on our website:

Corus Construction & Industrial Redcar, United Kingdom
British Sugar plc Peterborough, United Kingdom
ConocoPhillips Seal Sands, United Kingdom