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Simple JavaScript Games
Initially these games were intended to emulate those I wrote to run on a 16-Bit minicomputer. However, the temptation to experiment with the combination of JavaScript & CSS features proved too great. Consequently these games meerly give a flavour of those first available, for pure fun, circa early 1970s.

World War II German Third Reich Cipher Machines
The Enigma and the Lorenz SZ were the principle machines used by the Nazi for secret communications. Somewhat ironically it proved much harder to produce an emulator for the Enigma machine than for the Lorenz SZ teletypewriter that employed a far more complex and virtually unbreakable method of encipherment compared to that of the Enigma machines.

Information relating to Railways of the past - primarily for modellers.

History of Digital Computers / Digital Data Processors
Digital computers provide the capability of handling large amounts of data together with repetitive manipulation and/or calculations. A military need saw the initial development of a digital data processor, however the scientific and commercial communities soon recognised its potential for their purposes.
Covers the key figures: Alan Turing, Tommy Flowers and Max Newman, and the part John Von Neumann played. The evolution of digital computers is presented in the form of time-line.

Unit Conversion & Equivalence
Convert car engine power in PS to BHP & Torque in Kilo-Newtons; Distance in Feet, Metres, Miles & Kilo-metres; Speed in Km/hr & MPH.