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45 Cards in this Set

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  • Back
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Input, processing, output, storage

Computer performs 4 basic operations. What are these?

Program

List of instructions that tells comp how to perform 4 basic operations

Input

First operation


arithmetic or comparison


Electrical impulses

Processing

Second operation


Arithmetic or comparison (logical)


At Very high speed

Output

3rd operation


Shows results of processing operation in comprehensive way


Data into info

Storage

4th operation


Data saved for later use

Algorithms

Computers use this to solve problems


Step by step procedure

Fetch Execute Cycle


Instruction Execute Engine

Aka ______


Machine cycling through series of operations

1. Get the next instruction


2. Figure out what to do


3. Gathering the data needed to do it


4. Do it


5. Save the result

In a fetch-execute cycle, this sequence repeats in a neverending cycle

(mnemonic: Get FiGaDo and Save him!)

1. Memory


2. Control Unit


3. Arithmetic/Logic Unit (ALU)


4. Input Unit


5. Output Unit

5 basic parts or subsystems of computer



(mnemonic: Aluha ALUkbar will only do memory control to them. Simple, in and out.)

Anatomy of computer (diagram ba tawag dito basta figure)

Computer fluency

Skills possessed by comouter literate ppl

Charles Babbage


1833 and 1877

Father of computing


What years?

Tim Berners-Lee


1989

Invented the World Wide Web


In what year?

input unit


cpu(central processing unit)


output unit

3 basic components of comp system


responsible for making comp function

input uniit

help users enter data

central processing unit

brain of comp


performs all data processing operations


data and commands process acc to instructions provided from CPU

Output unit

processed data converted into format w/c humans can undnerstand

ALU (Arithmetic Logic Unit)
Memory Unit
Control Unit

ALU (Arithmetic Logic Unit)


Memory Unit


Control Unit

3 basic components of CPU

Memory unit

once user enters data w/ input devvices, comp system stores data here.




uses set of pre-programmed instructions to transfer data to other parts of cpu

arithmetic and logic unit

performs arithmetic operations


mathematical calculations, logical functions

control unit

backbone of computers


responsible for coordinating tasks


collects data from input units & sends to processing units, then transmits processed data to output units for users

OUTPUT DEVICE


(visual, data, sound, print)

piece of comp hardware that receives data from computer then translates that data in another form

may be visual, data, print, sound

monitor

has screen, circuity, power supply, buttons to adjust screenn settings, and casinf containing all these




displays data from comp onto screen

an output device

CRT = Cathode Ray Tube

display lights up a series of dots with beam on active part of screen

an output device

1600 x 1200 px

maximum resolution caused by CRT

an output device

LCD or Liquid Crystal Display

entered the market in 2000 and outsold CRT monitors in 2007

an output device

Printer

create a copy of whatev is sent from comp to printer




generate hardcopy

an output device

photocopying aka xerography

the origin technology of modern day printing

an output device

chester S. Carlson of Queens in 1938

he invented photocopyying (and in what yr)

plotter

type of print output device similar type of hardware to printer ( prints vector graphics)

an output device

headphones


aka earphones

output audio from comp thru 2 individual headphones for 1 listener w/out disrupting others

an output device

nathaniel baldwin of utah, 1910, by Naval radio operators

he(name and place) submitted a headphone prototype to the us navy in (year) which was adopted some yrs by (who?)

Koss corporation, 1958

first commercial stereo heaphones in what year and developed by whom?

computer speakers

transform signal from computer's sound card to audio


create sound using internal amplifiers that vibrate @ diff freq


produce sound

an output device

projector

projects comp images or vid onto wall or screen

an output device

GPS


sender broadcasts signals to 24 satellites that ping to the sender the location of sender computer in form of long. and lat. coordinates

radio-based navigation system


has sender comp annd receiver


how does it work?

an output device

GPS = Global Positioning system

used broadly across the world in agriculture, aviation, military, sci, etc

an output device

sound card


aka expansion card, meaning it can be added to motherboard

controls output of sound signals, enabling audio devices work


another name and meaning of this name?



an output device

when comp data sent thru sound card, it is sent thru card digitally. then sound card translates the digi info (binary) into analog info(vibrations, then sound).

how does sound card work?

an output device

video card

expansion card that slots into the motherboard enabling visuals to be seen on display

an output device

braille reader


text is sent by comp to device, where it is translated into braille format annd made readable by pushing pins up through a flat surface.

peripheral device for the blund to read text


how does it work?

1. 63 character alphabet


2. 1824


3. Louis Braille


4. embossed on paper & other mats

1. how many charactersin braille alphabet


2. year braille was invented


3. inventor of braille


4. braille was------------ before braille reader technology was invented

1. Speed


2. Accuracy


3. Reliability


4. Adaptability


5. Storage

capabilities of comp system (makes the user exp more efficient)

1. lack of common sense


2. zero iq


3. lack of decision making

limitations of comp systems