Read the text and order the paragraphs

[1|2|3|4|5] The third generation came due to the replacement of transistors with integral chips. That made computers more powerful but also smaller and cheaper. So it was possible to perform several programmes on one machine.

[1|2|3|4|5] However, the Intel company continued their research and in 1974 they produced the 8-bit processor Intel 8080. That was a huge step ahead which led to the fifth generation of computers, which has still been developing and improving since 1984.

[1|2|3|4|5] The "smaller" version appeared only after the invention of transistors. As a result, the machines were more productive and reliable. The first operating systems were integrated and were used for better machine management. Such systems were considered to be the second generation of the electronic computation systems.

[1|2|3|4|5]The first electronic computation systems weren't as small as they are now. They could be the size of a building! They ran on light bulbs and consumed enormous amount of electricity. However, these types of computers already had a central processing unit (CPU), a random access memory (RAM) and input/output devices. During the war such systems were mostly used for military purposes and, after the war, in educational institutions.

[1|2|3|4|5] The fourth generation of computers was represented by the first 4-bit microprocessor Intel-4004, which was produced in 1971. The processor could fulfil only four basic arithmetic operations and was used mostly in pocket calculators.