[DOC] [TLE] Charles Babbage - Wikipedia [PAR] Charles Babbage KH FRS was an English polymath. A mathematician, 
philosopher, inventor ... His varied work in other fields has led him to be 
described as "pre-eminent" ... In 1991, a perfectly functioning difference engine 
was constructed from .... he won its Gold Medal, cited "for his invention of an 
engine for calculating... [DOC] [TLE] Analytical Engine - Wikipedia [PAR] The Analytical Engine was a proposed mechanical general-purpose computer 
designed by ... The work on the design of the Analytical Engine started in 1835. ... 
Late in his life, Babbage sought ways to build a simplified version of the .... Table-
sized instead of room-sized, the device was capable of calculating tables, but... [DOC] [TLE] What is Difference Engine? - Definition from WhatIs.com [PAR] The Difference Engine, designed in the 1820s by the English mathematician ... In 
the meantime, Babbage had designed a general-purpose computer, the 
Analytical Engine. He sought funds to either complete the Difference Engine or 
commence his ... The Difference Engine was eventually built in 1991, the 
bicentennial of... [DOC] [TLE] The Babbage Engine | Babbage Engine | Computer History Museum [PAR] Charles Babbage and his Difference Engine #2. Charles Babbage (1791-1871), 
computer pioneer, designed the first automatic computing engines. He invented... [DOC] [TLE] The Difference Engine: Charles Babbage and the Quest to Build the ... [PAR] ... integrity of results," and in the 1820s he completed plans for the "Difference 
Engine. ... He went on to design the "Analytical Engine," a quicker, more 
advanced, more ... First, is the discussion of Babbage's life and his computing 
engines. .... working machine from the 150 year old plans that adds the magic "
hands on" touch... [DOC] [TLE] "Was Babbage's Analytical Engine an Instrument of Psychological ... [PAR] This paper is an abridgement of "Charles Babbage, the Analytical Engine, ... 
began work on a mechanical computer that he dubbed the Analytical Engine in 
the mid-1830s. ... The machine he designed implemented a then-common 
mathematical ... In the late 1820s, Babbage toured Europe , devoting much of his 
travel to... [DOC] [TLE] Charles Babbage Institute: Who Was Charles Babbage? [PAR] The calculating engines of English mathematician Charles Babbage (1791-1871) 
... As a youth Babbage was his own instructor in algebra, of which he was ... In 
1821 Babbage invented the Difference Engine to compile mathematical tables. ... 
The calculating device was completed and working by 1991, just in time for the... [DOC] [TLE] Booting Up a Computer Pioneer's 200-Year-Old Design | Science ... [PAR] Apr 1, 2009 ... The plans looked good on paper, but Babbage was never able to build his 
machine. ... In an attempt to build his difference engine in the 1830s, Babbage 
secured ... Babbage designed and partially built an ambitious device he would 
call ... Only if the London Museum agreed to build a working replica for his... [DOC] [TLE] Inventor Charles Babbage Biography - The Great Idea Finder [PAR] May 4, 2006 ... 1822 he first discussed the principles of a calculating engine in a letter to Sir 
Humphrey Davy ... on the invention and design of his vast mechanical calculating 
engines. ... In the 1820s Babbage began developing his Difference Engine, .... 
The calculating device was completed and working by 1991, just in... [DOC] [TLE] The Beginning of a Computer: Charles Babbage, Ahead of His Time ... [PAR] Oct 20, 2015 ... Long before the advent of practical electronics or digital devices, ... prompted 
Babbage towards his pioneering work towards computers. ... difference engine, 
the first one actually built from Babbage's design. ... Whilst Babbage constructed 
detailed plans and notes on the Analytical Engine, he was unable to... [DOC] [TLE] What is an Analytical Engine? - Boston Commons High Tech Network [PAR] Dec 6, 2015 ... After finishing of the work on the design of the Analytical Engine in 1847, 
Babbage ... [1] By the time funding ran out for his Difference Engine in 1833, he 
had ....

Question: The difference engine, a computing device he designed in the 1820s, was built in 1991 from his plans & it worked!
Answer: (Charles) Babbage