## The billionth Casio calculator

Casio's billionth calculator has been delivered. Where to next?

Casio's billionth calculator has been delivered. Where to next?

Some factoids on where we are headed - and the implications.

*Browsing Visualizations* has hundreds of visual displays of data sets. Who said statistics was boring?

Australia is suffering the worst drought in 100 years. The Southern Oscillation Index helps Australian farmers to predict rainfall and temperature.

Biorhythms claim to tell us when we should feel good and what days to stay in bed. They are an interesting application of sine curves with different periods.

U21 Global is an online university with headquarters in Singapore. I was impressed with their approach to e-learning.

Jakob Nielsen, the usability guru, gives guidelines on presenting numbers on the Web.

In this newsletter:

1. This month's math tip

2. Earth Day

3. Latest IntMath Revisions

4. Latest from the math blog

Singapore has strict laws concerning photos of protected and restricted places. It means that a local online street directory cannot show all Google satellite imagery of the island.

A report by the National Center for Education Statistics of the USA gives an interesting insight into crime in schools and by school-age people.

See the blog sitemap for all previous articles.

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