To my parents, who always encouraged and provided me with the opportunity to acquire the most valuable of all commodities: knowledge.
Acknowledgements
Once again I have been fortunate enough to have good friends and colleagues to help with the provision of ideas, information and proofing. For this edition my grateful thanks go to Bob Adamson, Jeremy Atkinson, Rod Elvish, Warren Kreyzig, Michael Potter, Keith Skipper and Paul Umgeher.
A number of people have helped with past editions, which have laid the foundations for this one. My thanks go to Andy Border, Howard Brady, Bob Cameron, Arron Collaran, Ann Diamant, Andrew Driscoll, Joel Forwood, Tim Gerrard, Tim Goldsmith, Phil Gray, Tim Knapton, Murray Kornweibel, Garry Lowder, Richard Kuo, ...
