A Beginner's Guide to Computer Science! Content of the App. Duction. History of Computers. Abacus. Napier's Bones. Slide Rule. Jacquard's Loom. Charles Babbage. Analytical Engine. Evolution of Computers. 1st Generation Computers. 2nd Generation Computers. 3rd Generation Computers. 4th Generation Computers. 5th Generation Computers. Classification of Computers.