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The shot clock will be started when all balls come to rest, including spinning balls. The abacus, device for counting, adding, substracting, multiplying, dividing, raising to power or extracting root by means of stones lined in a groove or of balls threaded in a wire, is of unknown origin. Which means the distance the Earth moves when everybody jumps will be one trillionth of the distance that all the people jumped: that is to say, 10-11 metres, or about half the radius of a hydrogen atom. You jump up, the Earth goes down: you fall down, the Earth comes up to meet you. Moving the Sun is about 6 orders of magnitude more difficult than moving the Earth but the Sun is continuously emitting energy which can be productively harnessed for this purpose. Since the Sun carries the vast majority of the entire mass of the solar system, any force which moves it is likely to drag all of the planets along with it. If balanced correctly, the "hat" neither falls into the Sun nor is blown away. Build an enormous lightweight "hat" for the Sun, which catches the Sun's rays.

There are also complete Integrated Development Environments, allowing the programmer to build a whole application in assembly only, or to combine assembly with a high level language. There is documented use in the Roman Empire, China, Japan and a few other countries since the I century or before, in more countries afterwards. About the I or II century after Christ it is developed in India a system of numerals in base of ten that introduces the concept of zero, and of values that depend on the location of each cipher inside a number. The Indian numeral system thus becomes known to Muslim scholars in the Iberian Peninsula in that VIII century, and thence it slowly spreads to the rest of Europe, becoming about the XII century predominant over the Roman numeral system (although Roman numerals are still used today). The system reaches Persia, probably during the government of the Shah Xusraw I Anushiravan (also known as Khusraw, Khosro, or Chosroes), from the year 531 to the 578 or 579, when the relations between India and Persia were frequent. Until 1850 fifteen hundred Arithmometres (or Arithmographs) had been sold, about fifty per year.

Although improvements made in Computing advance at an incredible speed, devices or machines that could be considered as a kind of primitive computers have been projected, or have been tentatively or effectively built, for the last two hundred to four hundred years. Most advanced computers built since the mid 1940's are fully electronic, although purely mechanical or electro-mechanical counters or calculators were built until the 1970's. 1847: The Mathematical Analysis of Logic, essay by George Boole. 1854: An Investigation of the Laws of Thought, algebraic system for enunciators of formal logic, by George Boole. The first operational mechanic computer was built by Vannevar Bush in 1930. The first electro mechanic tabulator was built by Hermann Hollerith in 1880-1889. The first electro mechanic computers were tentatively built by George Stibitz with Samuel Williams in 1937-1940, although they were never finished by them. Taking the word "computer" in its etymological sense of "counter" or "calculator", some of those primitive computers are: -The calculation devices of John Napier in 1617, of William Oughtred in 1621-1627, and of Bissaker in 1654. -The calculator machines of Heinrich Schickart in 1623, of Blaise Pascal in 1642-1652, of Sir Samuel Morland about 1660, of Wilhelm Leibnitz in 1694, and of Mattieu Hahn in 1779. Besides those purely mathematical calculators, the first automatic machines were built by M. Falcon in 1728, by Basile Bouchon in those years, and by Joseph Marie Jacquard in 1801-1804. The first mechanic computers were tentatively built by Charles Babbage in 1821-1834 and in 1834-1871, although they were never finished by him.

1821-1834: Differential Machine, logarithmic calculator machine for polynomes of up to eight terms, using numbering base of ten, by Charles Babbage, according to his own theory of 1812. Tentatively built between 1821-1834 but never finished, it exists a modified version built between 1840-1854 and a perfected version built between 1859-1860, both by Pehr Georg Scheutz. It would have been the first hardware programmable mechanic arithmetic (digital) computer, but because it was only built in 1991, that honour corresponds to computers built in the 1930's. The majority of operational computers of advanced concept, in numbering base of two, which were built in the 1930's and until the mid 1940's, were electro-mechanic rather than purely mechanic. Therefore computers using other character encodings may render some characters inaccurately, but hopefully, it will still be possible to read non-English words without too much difficulty. Snooker is a much more complicated game. Neville Chamberlain, a lieutenant, wanted to modify certain things about the "black pool." The game involves one black ball and 15 red ones. If only the cue ball interferes, then it is placed as follows: if the object ball is in front of or on the head string, the cue ball is in hand behind the head string; if the object ball is behind the head string, the cue ball is spotted on the head spot, or on the center spot if the head spot is blocked.

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