computer presentation

Topics: Computer, Assembly language, Programming language Pages: 20 (696 words) Published: February 24, 2015
WELCOME…
TO OUR PRESENTATION

THE NEXT
GENERATION

NAME OF GROUP
MEMBERS
 MD.

MEHEDI HASAN
 YOUNUS ALI RAKIB
 SANZIDA SULTANA
TANIA
 SYEDA MUNIA
AKHTER
 MD. TARIKUL ISLAM

 1987
 1606
 1587
 1584
 1584

OUR PRESENTATION TOPIC
OUTPUT

DEVICES &
PROGRAMMING LANGUAGE

Output Devices
◦ An output device is any peripheral
that receives or displays output from a
computer.

OUTPUT DEVICES
◦ Display devices
◦ Printers
◦ Plotters
◦ Voice output devices
◦ Speaker
◦ Multimedia Projector

What is a display device?


Output device that visually conveys
information


Information on display device sometimes
called soft copy

Monitor houses display device as separate
peripheral
 CRT MONITOR
 LCD MONITOR
 LED MONITOR


CRT MONITORS
Contains cathode-ray
tube (CRT)
Screen coated with tiny dots of phosphor material





Each dot consists of a red, blue, and green
phosphor

Common sizes are 15, 17, 19, 21, and 22 inches


Viewable size is diagonal measurement of actual
viewing area

CRT Monitors
How

does video travel from the processor to a
CRT monitor?


Video card (also called a graphics card) converts digital
output from computer into analog video signal

Step 5. Electron guns
Step 1. The
processor sends
digital video data
to the video card.

fire the three color signals
to the front of the CRT.

Step 3. The
analog signal is
sent through a
cable to the CRT
monitor.

Step 4. The
CRT monitor
separates the
analog signal
into red, green,
and blue signals.

Step 6. An image is
Step 2. The video card’s
digital-to-analog converter
(DAC) converts the digital
video data to an analog signal.

displayed on the screen when
the electrons hit phosphor
dots on the back of the screen.
9

LCD MONITORS
Liquid

Crystal Display(LCD)
An LCD monitor is a thin, light
computer monitor that displays
images through the use of a liquid
crystal display.

LED MONITORS
LIGHT

EMITTING DIODE (LED)
Abbreviation of light emitting
diode, an electronic device that
lights up when electricity is
passed through it.

Printers
What





is a printer?

portrait

Output device that
produces text and
graphics on paper
Result is hard copy, or
printout
Two orientations: portrait
and landscape
landscape

12

Plotters
 To created high-quality graphics
documents with multicolored pens to
draw computer output.
 Slower than printers but are useful for
outputting large-size charts, maps or
drawing.

Voice output devices
◦ Voice output devices
 Converts digital output data into
intelligible speech.

Speakers
 To deliver an audio output such as music,
that is connected to the computer





Programming
Languages
Programming Language

is an agreed
upon format of symbols that allow a
programmer to instruct a computer to
perform certain predefined tasks.
Provide features to support the data
processing
activities,
which
include
declaring variables, evaluating numeric
expressions, assigning values to variables,
reading and writing data to devices, looping
and making decisions.
17

 a.

Machine Languages

Machine Languages

◦ Is the natural language of a computer.
◦ Does not need to translate and is ready for immediate
execution.
◦ Machine language instruction is a binary string of 0s and 1s. 

010 1 1000 0001 0000 1100 0000 0001 0000

◦ Are machine-dependent - each computer type has its own
machine language.
◦ Programs written in machine languages are not portable
because programs written in for one type of computer
cannot be run on another type

18

Assembly Languages

Assembly Languages






Consists of English-like abbreviations.
Easier to understand.






Program written in assembly languages cannot be
directly processed by a computer.
Must use language translators, called assemblers, to...
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