To be fair, there actually is a semiconductor industry here, so "Silicon" would be an apt description.

Absolutely. I was surprised to find how big the semi industry is in ATX, we have (off the top of my head):

1) Intel

2) AMD

3) Nvidia

4) NXP

5) Samsung (they even have a fab here!)

6) ARM

7) Qualcom

And several hardware start ups, etc. It is actually a pretty major part of the local economy.

Silicon Labs

Cirrus Logic

Calxeda

Ambiq

RIP Calxeda