The computer!
Though why anyone wants pi toso many significiant figures is another matter.
Computer
computer!!
The computer
The computer. And it is not limited to 500 million decimal digits; currently it is possible to calculate pi to several TRILLION decimal places.
Research the invention of the computer.
a computer
The Computer
The evolution of computer technology allows us to calculate the value of pi to an ever-increasing number of decimal places. In 2010 a computer in China calculated pi to 5 trillion decimal places.
Microprocessors
The invention is... the window!
The greatest invention to improve communication recently is the cell phone. This invention allows people to stay connected any time, any where.
A Window