FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -Charles Babbage began to construct a small difference engine in c. 1819 and had completed it by 1822 (Difference Engine 0).

Detailed explanation-2: -1823: The concept of a gas vacuum engine is patented by British engineer Samuel Brown.

Detailed explanation-3: -Charles Babbage (1791-1871), computer pioneer, designed two classes of engine, Difference Engines, and Analytical Engines.

Detailed explanation-4: -In 1821 Babbage invented the Difference Engine to compile mathematical tables.

Detailed explanation-5: -The Analytical Engine was a proposed mechanical general-purpose computer designed by English mathematician and computer pioneer Charles Babbage.