You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "when was the first computer invented in the world?" whose answer is 1833.
Each document should contain about 30 words, and these documents should contain useful information.

Query: earliest mechanical computer
Useful Output:

Doc 1: From ancient abaci to the mid-20th century when electronic pioneers brought forth marvels like ENIAC and UNIVAC, let's look at early
Doc 2: Analytical Engine, generally considered the first computer, designed and partly built by the English inventor Charles Babbage in the 19th century.
Doc 3: The first known mechanical calculating device is the abacus, which is believed to have been invented in ancient Babylon around 2400 BC. However,
Doc 4: First mechanical computer or automatic computing engine concept. In 1837, Charles Babbage proposed the first general mechanical computer, the
Doc 5: The inventor of the first mechanical computer, Charles Babbage, was a great mathematician who became a pioneer in designing a programmable