This homepage is the result of a darwinistic selection process: Things that have been received well have been allowed to stay, everything else has been dropped. Time and space limits have speeded up this process quite a bit.
I nevertheless hope that you, dear visitor, will find something on this site you will find helpful in one or the other way.



Logger is a Windows program which automatically logs the time every time your PC boots or shuts down. You can use Logger to check if somebody has been at your PC or to automatically keep track of your working hours. Logger is freeware and has been nominated one of the 25 best freeware programs by PC-WELT. More...


Abacus - History and Operation

My A-levels paper about the history and functions of the abacus. In German only.

German version / Deutsch
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