<P> The word `` silicon '' originally referred to the large number of silicon chip innovators and manufacturers in the region , but the area is now the home to many of the world 's largest high - tech corporations , including the headquarters of 39 businesses in the Fortune 1000 , and thousands of startup companies . Silicon Valley also accounts for one - third of all of the venture capital investment in the United States , which has helped it to become a leading hub and startup ecosystem for high - tech innovation and scientific development . It was in the Valley that the silicon - based integrated circuit , the microprocessor , and the microcomputer , among other key technologies , were developed . As of 2013 , the region employed about a quarter of a million information technology workers . </P>
<P> The word `` silicon '' originally referred to the large number of silicon chip innovators and manufacturers in the region , but the area is now the home to many of the world 's largest high - tech corporations , including the headquarters of 39 businesses in the Fortune 1000 , and thousands of startup companies . Silicon Valley also accounts for one - third of all of the venture capital investment in the United States , which has helped it to become a leading hub and startup ecosystem for high - tech innovation and scientific development . It was in the Valley that the silicon - based integrated circuit , the microprocessor , and the microcomputer , among other key technologies , were developed . As of 2013 , the region employed about a quarter of a million information technology workers . </P>
which industry has a large presence in the silicon valley
which industry has a large presence in the silicon valley
high - tech
high - tech