Lecture 1: Introduction to Computer Concepts and History of Computers Flashcards
an electronic device that takes data, process the data
according to a series of instruction
COMPUTER
called program and produces information
COMPUTER
an electronic device capable of performing mathematical and
logical operations.
COMPUTER
an electronic system designed to manipulate data.
COMPUTER
series of instruction that a computer must follow in order to process data into information.
PROGRAM
ENUMERATE: Capabilities of Computers
- It has the ability to perform mathematical and logical
operation. - It has the ability to store or remember a great amount and
variety of information and retrieve or recall the information
needed almost instantly. - It has the ability to handle large volume of repetitive tasks
accurately over long period of time. - It can communicate with its operators and other machines.
- It has the ability to control error and check itself.
ENUMERATE: Limitations of Computers
- The computer functions only when input and the necessary
instructions to process the information have been provided
by a human being. - It can detect but generally cannot correct inaccurate entry
by itself. - It is subject to occasional breakdown or computer
malfunction because of power failures, computer failure,
humidity, temperature and maintenance time.
ENUMERATE: Characteristics of Computers
- MACHINE
- ELECTRONIC
- AUTOMATIC
- MANIPULATE DATA
- MEMORY
- LOGIC FUNCTIONS
Computers can be used in:
- BUSINESS
- HOME
- ENTERTAINMENT
- SCIENTIFIC RESEARCH
- MILITARY
ENUMERATE: Benefits of Computers
- Storing or memorizing large amount of information.
- Quickly recalling a single piece of information.
- Rapidly performing a series of sequential tasks.
- Carrying out a specific action based on sensor reading or
other quantifiable information.
ENUMERATE: Types of Computers
- Mainframes
- Personal Computers
* Desktop Computers
* Laptop Computers - Tablet PCs
- Media Centre
- Personal Digital Assistants (PDAs)
considered as the 1st manual data processing device
ABACUS
developed in China in __________ and performs arithmetic calculations
ABACUS; 12TH CENTURY A.D.
developed by a Scottish mathematician John Napier, obtain products & quotients of large numbers
NAPIER’S BONES
NAPIER’S BONES is developed by?
SCOTTISH MATHEMATICIAN JOHN NAPIER
arithmetic operations could be done by simply sliding the
rulers
OUGHTRED’S SLIDE RULE
OUGHTRED’S SLIDE RULE is invented by ___________ in 17th century
WILLIAM OUGHTRED
could add & subtract numbers up to 8 digits
PASCAL’S CALCULATOR
PASCAL’S CALCULATOR is developed by a _______ mathematician ____________ in
1645
French; BLAISE PASCAL
it utilized the same techniques for addition & subtraction as
Pascal’s device but could also perform multiplication, division
& square root
LEIBNIZ CALCULATOR
LEIBNIZ CALCULATOR is invented by _____________ in ____
GOTTFRIED LEIBNIZ; 1694
developed by Charles Babbage, the Father of Modern Computer. It is not because of the machine he build but rather his ideas became the basis for modern computation devices
BABBAGE ANALYTICAL ENGINE
BABBAGE ANALYTICAL ENGINE
designed to use 2 types of cards:
VARIABLE CARDS AND OPERATION CARDS
worked with Babbage & considered as the First
Programmer
AUGUSTA ADA BYRON
considered as the 1st commercially successful data
processing machine.
HOLLERITH’S PUNCHED CARD MACHINE
Hollerith’s Punched Card Machine is developed by a statistician named __________ in ____
HERMAN HOLLERITH; 1880
Hollerith made a census machine used by the ___________________ in _____
US BUREAU OF CENSUS
Founder of Boolean Algebra in ______
GEORGE BOOLE
Created of _______________ in ________ the General Purpose Programmable Computer
ALAN TURING; 1930s
John Atanasoff creates ?
FIRST ELECTRONIC DIGITAL PURPOSE COMPUTER/ ATANASOFF BERRY COMPUTER
Introduced the concept of debugging
or finding errors in 1940
GRACE HOPPER
the first programmable general-purpose electronic digital computer
ENIAC/ ELECTRONICS NUMERICAL INTEGRATOR AND COMPUTER
introduced stored-program architecture
EDVAC/ ELECTRONIC DISCRETE VARIABLE AUTOMATIC COMPUTER
First operational electronic computer in the UK, inspired by ENIAC
EDSAC/ ELECTRONIC DELAY STORAGE AUTOMATIC COMPUTER
introduced the computer simulation
STANISLAW ULAM
introduced the microprocessor chip in 1960s
TED HOFF
The co-founders of the Microsoft Corporation that starts from 1970s
PAUL ALLEN AND WILLIAM HOWARD(BILL GATES)
proposed/invented the World Wide Web (www) in 1980s
TIM BERNERS-LEE
ENUMERATE: Computer Classifications
- ACCORDING TO AGE AND COMPONENT
- ACCORDING TO SIZE
- ACCORDING TO OPERATION
- ACCORDING TO APPLICATION
- ACCORDING TO DESIGN
ENUMERATE: According to age and component generations (Generation and Components)
- First Generation: Vacuum Tubes
- Second Generation: Transistors
- Third Generation: Integrated Circuits
- Forth Generation: MSI/LSI (Medium Scale Integration/Large Scale Integration)
- Fifth Generation: AI (Artificial Intelligence)
- slow
- expensive
- fragile
- very large
Vacuum Tubes
- much simpler
- much smaller
- much cheaper
- more reliable
- no warm up
- much faster
Transistors
- miniaturization added to all the existing benefits
- enabled un-thought of possibilities
Integrated Circuits
- making computers behave like humans
- Games Playing, Expert Systems, Natural Language, Neural Networks, Robotics:
Artificial Intelligence
ENUMERATE: According to Size
- Mainframes
- Minicomputers
- Microcomputers
used to describe large computers. It can process large amount of data at very high speed, hold up to millions of characters in its storage and support many input, output, and storage devices.
Mainframes
relatively smaller and slower computers compared to mainframe.
Minicomputers
typically fits a desktop. Inside of it is microprocessor, which has control capability for memory and I/O access, and which contains an arithmetic logic unit all on a single, chip less than one quarter of an inch square.
Microcomputers
ENUMERATE: According to Operation
- Digital Computers
- Analog Computers
- Hybrid Computers
operates essentially on the basis of distinct (discrete) “on” and “off” states which can be represented by 1’s and 0’s referred to as binary digits
Digital Computers
operate by measuring continuous physical or electrical magnitudes such as pressure, current, voltage, length or shaft rotations
Analog Computers
combination of the desirable qualities of the analog and digital computers
Hybrid Computers
ENUMERATE: According to Applications
- Scientific Computers
- Business Computers
computers that can manipulate numbers according to sophisticated formulas and keep track of the results to several decimal places
Scientific Computers
computers that usually handle large volumes of data for input, perform simple calculations like addition and subtraction and print vast number of reports
Business Computers
ENUMERATE: According to Design
- General Purpose Computers
- Special Purpose Computers
designed to perform a variety of operations by simply changing instructions
General Purpose Computers
built for specific operation and usually satisfies the needs for a particular type of problem
Special Purpose Computers