What company developed the Xpander graphing calculator but never put it into production?

More Questions:

What year did designer Manolo Blahnik create his first collection for Bloomingdale's?

In 1983, who became the first African American to win the Miss America Pageant?

Machu Picchu is located in what country?

Which US state was established by William Penn in 1681?

In what country is the Great Sandy Desert located?

Which US state's official flower is the orange blossom?

What are the young of seals called?

In what organ of the human body would you find the cornea?

What is the next number in this series: 11, 13, 17, 19, 23?

In whose memory did Puff Daddy record the song "I'll Be Missing You" in 1997?

What actor died at the age of 24 while driving his Porsche Spyder?

Kim Smith is the real name of which singer?

Who was the first U.S. billionaire?

Who is Cleveland, Ohio, named after?

What was the two-word code name for Woodward and Bernstein's secret Watergate source?