1. A nanosecond is one-billionth of a second.

2. In 2008, Logitech ships its one-billionth mouse since it began selling them in 1982.

3. A nanometer is one one-billionth of a meter or about 100, 000 times smaller than the width of a human hair.

4. If you buy a share of IBM (IBM, news, msgs), for example, for your $130 or so you become the proud owner of not quite one-billionth of the company.

5. Researchers are finding different uses for particles with a length of one nanometer, or one-billionth of a meter.