FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -Census Bureau clerks using pantographs could prepare approximately 500 cards per day. To operate the mechanism, the operator positioned the punching stylus over the desired hole in a punch card template. Each hole in the template corresponded to a specific demographic category.

Detailed explanation-2: -The tabulating machine was an electromechanical machine designed to assist in summarizing information stored on punched cards. Invented by Herman Hollerith, the machine was developed to help process data for the 1890 U.S. Census.

Detailed explanation-3: -Census Bureau employees, led by James Legrand Powers, developed a new electric tabulation machine. The new device, with an automatic feeder and card sorter, was an improvement over the machines that Hollerith was offering.

Detailed explanation-4: -Herman Hollerith, (born February 29, 1860, Buffalo, New York, U.S.-died November 17, 1929, Washington, D.C.), American inventor of a tabulating machine that was an important precursor of the electronic computer.