FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -Herman Hollerith’s punched card tabulator transformed the census process-and information processing in general-beginning with the 1890 US census. The machine was able to collect and count data more rapidly and accurately than manual processes had allowed in the past.

Detailed explanation-2: -Hollerith Tabulator Dials When the bell signaled the card had been read, the operator recorded the data on the dials, opened the card reader, removed the punch cards, and reset the dials. Hollerith’s 1890 sorting table.

Detailed explanation-3: -The tabulator is shown at the center in the photograph. Hollerith’s tabulating system won a gold medal at the 1889 World’s Fair in Paris, and was used successfully the next year to count the results of the 1890 Census. His inventions formed the starting point of a company that would become IBM.

Detailed explanation-4: -Before Hollerith’s electric tabulating machine, census results were hand-counted and took years to process; the 1880 census results, for example, were not fully processed until 1887.

Detailed explanation-5: -Herman Hollerith worked for the Census Bureau during the 1880 census and then for the 1890 census, invented the electronic tabulators and punchcards that the Census Bureau used from 1890 until the 1950s.