WEEK 3 Flashcards
The evolution of computers has six generation
- pre-modern era
- first generation
- second generation
- third generation
- fourth generation
- fifth generation
The first use of the word “computer” was recorded in year?
1613
There are three classifications of devices that evolved during this era namely manual-mechanical devices, electromechanical, and electronic devices.
pre- modern era
pre modern era technologies
- Tally Sticks
- Abacus
- Napier’s Bones
- Oughtred’s Slide Rule
- Pascaline Calculator
- Stepped Reckoner
- Babbage’s Difference and Analytical Engines
- Arithmometer
was an ancient
memory aid device to record and document numbers, quantitieor even messages.
Tally sticks
It is also called a counting frame and is considered the first man-made computing device. In fact, it was
used for centuries. It uses beads and it was invented in China.
Abacus
It is a manually-
operated device used for calculating
products, quotients, square and cube
roots. It was invented by John Napier in
1614.
Napier’s Bones
It is a mechanical analog computer consisting of movable bars with a precise scale that uses approximations for solving problems
like multiplication, division, roots, logarithms, and trigonometry. It was invented
by William Oughtred.
Oughtred’s Slide Rule
It is also called Adding Machine. It is the first mechanical calculating device that uses cogged wheels that can be used to add and subtract two numbers. It was invented by Blaise Pascal in 1642.
Pascaline Calculator
Invented by Gottfried Wilhelm Leibniz in 1672. The machine
can add, subtract, multiply, and divide automatically.
Stepped Reckoner
These engines embodied most
of the design of modern computers. ThebDifference engine can compute tables and the Analytical engine is completely
automatic and is capable of calculating
any mathematical problems. It was
invented by Charles Babbage.
Babbage’s Difference and Analytical
Engines
A mechanical calculator invented by Thomas de Colmar in 1820, The first reliable, useful, and commercially successful calculating machine. The
machine could perform the four basic mathematic functions. The first mass-
produced calculating machine.
Arithmometer
Principal components of electronic devise
- circuit boards
- transistors or silicon chips
- electrical switches and circuitry
examples of electronic devices
- ABC (Atanasoff-Berry-Computer)
- Electronic Numerical Integrator and
Calculator (ENIAC) - Electronic Delay Storage Automatic Calculator (EDSAC).
The first special-purpose digital computer that solves
simultaneous equations. It was developed by
John Atanasoff.
ABC (Atanasoff-Berry-Computer)
The first fully electronic general-purpose digital
computer ever completed by John
Mauchly and J. Presper Eckert.
Electronic Numerical Integrator and
Calculator (ENIAC)
It is also known as an
Electronic Binary Digital computer that uses a binary representation of data and
internally stored programs; the first full-size stored-program computer, built at
the University of Cambridge, England by Maurice Wilkes and others to provide a
formal computing service for users. This was built according to the von Neumann machine principles.
Electronic Delay Storage Automatic Calculator (EDSAC).