Dokładna analiza wcześniej wspomnianego buga w Excelu
This article (500kb PDF) details the Excel 2007 formatting bug. On initial release, entering =850*77.1 in a cell results in 10000, instead of the correct 65535. This article shows this bug is the result of porting 16-bit code to 32-bit code, and shows why exactly 12 values of the possible 9*10^18 64-bit floating-point values are affected.
http://www.lomont.org/Math/Papers/2007/Excel2007/Excel2007Bug.pdf