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Old Russian (Byzantine) system of chronology

Old Russian calendar - years since world creation

Old Russian (Byzantine) system of chronologyCreative Commons Attribution/Share-Alike License 3.0 (Unported)
 

PBX channel number calculation

Calculates number of PBX telecommunications channels for given traffic load using Erlang B and Engset algorithms

Telecommunication channel number calculationCreative Commons Attribution/Share-Alike License 3.0 (Unported)

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