7. Answer the following questions:
a. What is an abacus?
Ans: Abacus is the first calculating device developed by the Chinese about 3000 BC.
b. Who invented Napier's bone? And when?
b. Who invented Napier's bone? And when?
Ans: Napier's Bone was invented by John Napier in 1617 AD.
c. What is the slide rule? Who invented it?
c. What is the slide rule? Who invented it?
Ans: The slide rule is the first analog calculating device. It was developed by William Oughtred.
d. What is Pascaline? What does it contain?
d. What is Pascaline? What does it contain?
Ans: Pascaline is the first mechanical Calculator invented by Blaise Pascal in 1642. It Contains eight dials, gears, and wheels.
e. Who is known as the father of Computers?
Ans: Charles Babbage is known as the father of computers because modern computers are based on his idea and technology.
f. Who is known as the first programmer?
f. Who is known as the first programmer?
Ans: Lady Augusta Ade Lovelace is known as the first programmer.
g. What did Dr. Herman Hollerith invent?
g. What did Dr. Herman Hollerith invent?
Ans: Dr. Herman Hollerith invented the tabulating machine.
h. Which is the first computer? Who invented it and what was it named?
h. Which is the first computer? Who invented it and what was it named?
Ans: Electro the mechanical computer was the first computer it was invented by Howard Aiken. It was called Mark-I.
i What was the first digital computer? Who invented it and when?
i What was the first digital computer? Who invented it and when?
Ans: Atanasoff Berry Computer (ABC) was the first digital computer. It was invented by Dr. John Vincent Atanasoff and his assistant Clifford Berry in 1942.
j. What was the first general-purpose computer? Who invented it?
j. What was the first general-purpose computer? Who invented it?
Ans: ENIAC (Electronic Numerical Integrator and Calculator was the first general-purpose computer. It was invented by John William Mauchly and John Presper Eckert in 1946 AD.
k. What was the first practical stored-program computer? Who invented it?
k. What was the first practical stored-program computer? Who invented it?
Ans: EDSAC (Electronic Delay Storage Automatic Computer was the first practical stored-program computer it was invented by Maurice Wilkes and his team.
l. Which computer was invented on the concept of John Von
Neumann?
l. Which computer was invented on the concept of John Von
Neumann?
Ans: EDVAC (Electronic Discrete Variable Automatic Computer) was invented on the concept of John Von Neumann.
m. Who invented UNIVAC-1?
m. Who invented UNIVAC-1?
Ans: UNIVAC-1 was developed by Dr. John William Mauchly and John Presper Eckert.'
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