Photo-voltaics, new appliances, and modern technologies tend to cost more money.

Such technology often tends to be not only far-reaching, but also far out - in terms of the time when it will start making money.

As we know, the technology, the actual chemistry, tends to wear out in a given spot.

The marketing plan, business model and sometimes the company itself die, but good technology tends to live on.

The technology tends to appeal to those with an interest in science and engineering or the military.

Semiconductor-type technology, just by its nature, tends to come down.

The technology, telecommunications and financial service sectors tend to hand out more options than most companies.

Distributed technologies, on the other hand, tend to be flexible, efficient and relatively benign in their environment effects.

"And when you get a sense of relief, technology tends to be a lead group," he added.

In addition, poorly designed technologies tend to produce low test scores and negative reactions from students.