A special treat for members: Samuel J Hardman's paper on "History of the Can Opener" is available on the Members' page at CanOpeners 

This is a fascinating paper and well worth reading, even if it is not within your area of interest. Mr Hardman has produced a well researched account of the development of the can opener and similar tools, illustrated with photographs from his collection. Some of them look very similar to our "Whatsits"!