Alternative fueled vehicles are gaining renewed interest with the abundance of cheap, domestic natural gas. Compressed natural gas (CNG) vehicles took off in the 1990s as infrastructure development surged. Service stations then declined for a decade but are now resurging. Liquefied natural gas and ethanol are other options, as is a new clean fuel called GDiesel, a combination of conventional diesel and natural gas that can be used on conventional diesel engines without modifications.
It has been a dozen years since the U.S. Postal Service introduced the Intelligent Mail barcode (IMb) to sort and track individual letters, cards, and flats. In many ways, the IMb has lived up to its early promise of many tools in a single barcode.
A series of 65 vertical bars carrying 31...Read More