"They've always been a much better sales business than technology business."

They also provide an indication of how fast things can change in the technology business.

For more information, see the page in this guide on technology businesses using good design principles.

Still, in the early days, sustaining a technology business here was difficult.

It says research and development spending in key technology businesses has increased 78 percent since 1984.

Following his retirement from military service, Johnson turned to creating and building high technology businesses.

During his administration, the state's unemployment rate fell to 6.2 percent, from 9.8, and 78,000 jobs were created, many in new technology businesses.

Now, almost half the tenants are in the technology business.

Clearly, a lot of the money, glamour and people have left the technology business.

"People forget that the technology business is one of the worst businesses you can be in," he said.