Quezi

In the 18th century wealthy men with private libraries in their grand houses wanted elegant furniture around them. The upmarket cabinet-makers of the period created fine desks and chairs, but how could they design new, improved versions of the step-ladders needed for reaching books from the highest shelves? One idea was to conceal steps under the [more...]

The International Standard Book Number (ISBN) is a unique 10-digit number used to identify books and other products, such as calendars and greeting cards. It does not include a bar code, it is just a number. The EAN, or Bookland symbol, is 3-digits + the ISBN, making a 13-digit number and includes a bar code for [more...]