Banknotes of Different Countries (In Past and Now) (Popularity: )

Images of currency of Ukraine, Austria, Brasil, Germany, Hungary, Poland, Yugoslavia, USA, Greece, Singapore, and ...
Category: Science\Social Sciences\Economics\Economic History

Convert World (Popularity: )

Interactive calculators used to for converting between currencies, weight, volume, mass, time, distance and more.
Category: Science\Reference\Units of Measurement\Online Calculators

How Electromagnetic Propulsion Will Work (Popularity: )

Illustrated tutorial shows how Goodwin's electromagnetic-propulsion system works and how it could send spacecraft deep ...
Category: Science\Technology\Mechanical Engineering\Propulsion

Costs and Wages in Great Britain (Popularity: )

Shows what a pence, shilling, and pound was actually worth throughout the history of Great ...
Category: Science\Social Sciences\Economics\Economic History

English weights and measures: (Popularity: )

Wire gauges SWG and metric conversions. NOT AWG.
Category: Science\Technology\Electronics\Reference

Westchester Amateur Astronomers (Popularity: )

News, events, bulletin board, images, and links.
Category: Science\Astronomy\Amateur\Organizations