<Tr> <Td> Pre-Columbian Texas </Td> <Td> </Td> </Tr> <Tr> <Td> Early Spanish explorations </Td> <Td> 1520--</Td> </Tr> <Tr> <Td> French Texas </Td> <Td> 1684--1689 </Td> </Tr> <Tr> <Td> Spanish Texas </Td> <Td> 1690--1821 </Td> </Tr>

Which of the following is considered to be the high tech region of the state of texas