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While a student at Harvard Business School, Bricklin co-developed VisiCalc in 1979, making it the first electronic spreadsheet readily available for home and office use. It ran on an Apple II computer, and was considered a fourth generation software program. VisiCalc is widely credited for fueling the rapid growth of the personal computer industry.
First possible date for the invention of the wheelbarrow in history; as the 5th century Book of the Later Han states that the wife of the once poor and youthful imperial censor Bao Xuan of the Chinese Han dynasty helped him push a lu che back to his village during their feeble wedding ceremony, around this year.
"It is worth a library of books on the subject of history" (G. McCloskie, L.L.D. Professor of Natural History at Princeton College) "Indicates at a glance the date, progress, and synchronism of historical events, as clearly as could be learned in days and weeks in ordinary historical works" (A.D. Hager, Secretary, Chicago Historical Society)
The Chronograph, Chronography, or Calendar of 354 is a compilation of chronological and calendrical texts produced in 354 AD for a wealthy Roman Christian named Valentinus by the calligrapher and illustrator Furius Dionysius Filocalus.
A graphical view of the Cosmic Calendar, featuring the months of the year, days of December, and the final minute. The Cosmic Calendar is a method to visualize the chronology of the universe , scaling its current age of 13.8 billion years to a single year in order to help intuit it for pedagogical purposes in science education or popular science .
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The Fasli society also claimed that their calendar was an accurate religious calendar, as opposed to the other two calendars, which they asserted were only political. [25] The new calendar received little support from the Indian Zoroastrian community, since it was considered to contradict the injunctions expressed in the Denkard.