Computers have come a long way in their development. put these computer generations in the order they appeared. first, second, third, fourth? 1. vacuum tube 2. transistors 3. integrated circuits 4. computer chips

The correct order is:

1. Vacuum Tube: First generation 1940 - 1956 The first computer systems used vacuum tubes for circuitry and magnetic drums for memory, and were often enormous, taking up entire rooms.

2. Transistors: Second generation 1956 - 1963 The world would see transistors replace vacuum tubes in the second generation of computers.

3. Integrated circuits: Third Generation. 1965 - 1971. The computers of third generation used Integrated Circuits (ICs) in place of transistors.

4. Computer chips.

the california missions began in the late 18th century as an effort to convert native americans to catholicism and expand european territory. there were 21 missions in all, lasting from 1769 until about 1833.   the missions were built by the spanish starting in 1769 in order to “colonize” the territory of alta california. so the missions were important because they were the means of settling california. it also wanted to keep other european countries out of alta california. building settlements along the coast would them meet these goals. missionaries wanted to convert the indians to the roman catholic faith. california indians did much of the work to build missions.