A Stock Symbol - or Ticker - is a series of characters (usually letters) that represent the company on a stock exchange. Most are simple abbreviations of the company name but some are more creative than that. Test your knowledge of some of the best ticker symbols with these multiple choice questions...

The vastness of space is mind-boggling for most of us, yet we remain fascinated with life beyond our own planet. Test your knowledge of our solar system with these multiple choice questions.

The International Space Station is a modular space station put into orbit around Earth in November, 1998. How much do you know about this fascinating space laboratory?

Over the last two centuries, advances in computer technology have transformed the way we live our lives. How much do you know about these icons of the industry?