Class 7 Chapter 2 Historical Development of Computer
a. What was the first manual calculating device? When was it invented?
Ans: Abacus was the first manual calculating device. It was invented by the Chinese people before 3000 BC.
b. Write a few lines about Jacquard's loom.
Ans: Jacquard's loom was invented by Joseph Marie Jacquard in 1804 AD. This loom was the first to use punched cards.
c. For what purpose was tabulating machine developed?
Ans: The tabulating machine was developed for summarising information stored on the punch card.
d. Which computer is called the first digital computer?
Ans: ABC was the first digital computer.
e. Explain ENIAC.
Ans: ENIAC was the first general-purpose electronic computer.
f. Who were the inventors of the UNIVAC computer?
Ans: The inventors of the UNIVAC computer were J. Presper Eckert and John Mauchly.
g. Which was the first computer that was based on the stored-program concept?
Ans: EDSAC was the first computer that was based on the stored program concept.
h. Make a list of computers used in the history of the computer.
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