Computer System Hardware Input Process Output Storage
Computer System Hardware
Input
Process
Output
Storage
Input Devices
Input is any data or
instructions you
enter into the
memory of a
computer. Once
input is in memory,
the CPU can access
it and process the
input into output.
Four types of input
are data, programs,
commands, and user
responses.
Differen
t Types
of Input
Devices
Differen
t Types
of Input
Devices
II Keyboard II
II Mouse II
II Digital Camera II
II Joysticks IIII Scanner II
II Microphone II
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Output Devices
An Output Device is a device which the computer uses to “put out” or display information whether it be visual (a printer, monitor, plotter), auditory (speakers), or even tactile (pagers or beepers which vibrate). It is possible that taste and smells may come from computers in the future.
Differe
nt
Types
of
Output
Device
s
Differe
nt
Types
of
Output
Device
s
II Monitor II
II Printer II
II Speakers II
II Plotter II
II Projector IIII Pager II
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StorageComputer data storage, often called storage or memory, refers to
computer components, devices, and recording media that retain digital data used for computing for some interval of time. Computer
data storage provides one of the core functions of the modern computer, that of information retention. It is one of the fundamental components of all modern computers, and coupled with a central
processing unit (CPU, a processor), implements the basic computer model used since the 1940s.
II Magnetic Storage Devices II
II Optical Storage Devices II
II Solid-State Storage Media II
“ II II “ (hyperlink)
K e y b o a r d
• is an input device, partially modeled after the typewriter keyboard, which uses an arrangement of buttons or keys, to act as mechanical levers or
electronic switches. A keyboard typically has characters engraved or printed on the keys and each press of a key typically corresponds to a single written symbol. However, to produce some symbols requires pressing and
holding several keys simultaneously or in sequence. While most keyboard
keys produce letters, numbers or signs (characters), other keys or
simultaneous key presses can produce actions or computer
commands.
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Mouse
• a mouse (plural mouses, mice, or mouse devices) is a pointing device that functions by detecting
two-dimensional motion relative to its supporting surface. Physically, a mouse consists of an object
held under one of the user's hands, with one or more buttons. It sometimes features other elements, such as "wheels", which allow the user to perform various
system-dependent operations, or extra buttons or features can add more control or dimensional input.
The mouse's motion typically translates into the motion of a pointer on a display, which allows for fine
control of a Graphical User Interface.
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Digital Cameras
• A digital camera (or digicam for short) is a camera that takes video or still photographs, or both, digitally by
recording images via an electronic image sensor.
• Digital cameras can do things film cameras cannot: displaying images on a screen immediately after they are recorded, storing thousands of images on a single small memory device, recording video with
sound, and deleting images to free storage space. Some can crop pictures and perform other elementary image editing. Fundamentally they operate in the same manner as film cameras, typically using a lens
with a variable diaphragm to focus light onto an image pickup device. The combination of the diaphragm and a shutter mechanism is used to admit the correct amount of light to the imager, just as with film; the
only difference is that the image pickup device is electronic rather than chemical.
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J o y s t i c k s
• A joystick is an input device consisting of a stick that pivots on a base and reports its angle or direction to
the device it is controlling. Joysticks
are often used to control video games, and usually have one or more push-buttons whose state can also
be read by the computer. A popular
variation of the joystick used on modern
video game consoles is the analog stick.
• Joysticks are also used for controlling machines such as
cranes, trucks, underwater
unmanned vehicles and zero turning
radius lawn mowers. Miniature
finger-operated joysticks have been
adopted as input devices for smaller
electronic equipment such as
mobile phones.
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Scanner • a scanner is a device that optically scans images, printed text, handwriting, or an object,
and converts it to a digital image. Common
examples found in offices are variations of the desktop (or flatbed) scanner where the
document is placed on a glass window for scanning. Hand-
held scanners, where the device is moved by hand, have
evolved from text scanning "wands" to 3D scanners used for industrial design, reverse
engineering, test and measurement, orthotics,
gaming and other applications. Mechanically driven scanners that move the document are
typically used for large-format documents, where a flatbed
design would be impractical.
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M i c r o p h o n e
• A microphone, sometimes colloquially called a mic or mike (both pronounced /maɪk/), is an acoustic-to-electric transducer or sensor that converts sound into an electrical signal. Microphones are used in many applications such as telephones, tape recorders, hearing aids, motion picture production, live and
recorded audio engineering, in radio and television broadcasting and in computers for recording voice, VoIP, and for non-acoustic purposes such as
ultrasonic checking.
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M o n i t o r• A monitor or display (sometimes called a visual display unit) is a
piece of electrical equipment which displays images generated by devices such as computers, without producing
a permanent record. The monitor comprises the display device, circuitry
, and an enclosure. The display device in modern monitors is typically
a thin film transistor liquid crystal display (TFT-LCD), while older monitors use
a cathode ray tube (CRT).
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P r i n t e r• a printer is a peripheral which
produces a hard copy (permanent readable text and/or graphics) of
documents stored in electronic form, usually on physical print media such as paper or transparencies. Many printers are primarily used as local peripherals, and are attached by a printer cable or, in most newer printers, a USB cable to
a computer which serves as a document source. Some printers,
commonly known as network printers, have built-in network interfaces
(typically wireless and/or Ethernet), and can serve as a hardcopy device for any user on the network. Individual printers are often designed to support both local
and network connected users at the same time.
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Speakers
• Computer speakers, or multimedia speakers, are external speakers, commonly equipped with a low-power internal amplifier. The standard audio connection is a 3.5mm (1/8 inch) stereo jack plug often colour-
coded lime green (following the PC 99 standard) for computer sound cards. A plug and socket for a two-wire (signal and ground)
coaxial cable that is widely used to connect analog audio and video components. Also called a "phono connector," rows of RCA sockets are found on the backs of stereo amplifier and numerous A/V products. The prong is 1/8" thick by 5/16" long. A few use an RCA connector for input. There are also USB speakers which are powered from the 5 volts at 200 milliamps provided by the USB port, allowing about half a watt of output
power.
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Plotter• A plotter is a vector graphics printing device to print
graphical plots, that connects to a computer. There are two types of main plotters. Those are pen plotters and
electrostatic plotters.
Pen Plotter
Electrostatic Plotter
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Projector• A slide projector is an opto-mechanical device to view photographic slides. It has four main elements: a fan-cooled electric
incandescent light bulb or other light source, a reflector and "condensing" lens to direct the light to the slide, a holder for the slide and a focusing lens. A flat piece of heat absorbing
glass is often placed in the light path between the condensing lens and the slide,
to avoid damaging the latter. This glass transmits visible wavelengths but absorbs
infrared. Light passes through the transparent slide and lens, and the resulting
image is enlarged and projected onto a perpendicular flat screen so the audience can view its reflection. Alternatively the
image may be projected onto a translucent "rear projection" screen, often used for continuous automatic display for close
viewing. This form of projection also avoids the audience's interrupting the light stream or
bumping into the projector. And a lot more different types of projector like
video, movie, overhead projectors.
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Pager• A pager (sometimes called a page,
beeper or bleep) is a simple personal telecommunications device for short
messages. A one-way numeric pager can only receive a message consisting of a few
digits, typically a phone number that the user is then expected to call. Alphanumeric
pagers are available, as well as two-way pagers that have the ability to send and receive email, numeric pages, and SMS
messages.
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Floppy Disks: small, portable disks that hold a limited amount of data.
Hard Disks: large-capacity and fast-access storage devices.
Zip Disks: auxiliary storage devices that can hold large quantities of data and can be portable.
Magnetic Tape Drives: used for making system backups and storing large quantities of data.
Magnetic Storage Devices
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Optical Storage Devices
CD-DA: audio-cd.
CD-R: this drive allows you to read and to write to a compact disk.
CD-ROM: can hold large amounts of data, but is read-only access.
CD-RW: can be written on several times.
DVD-ROM: read-only DVD format.
DVD-R: similar to CD, but holds more data; read-only.
DVD-RW: can be written on several times.
Photo-CD: used for storing digital photographs on CD.
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Solid-State Storage Media
Non-volatile removable Media Miniature mobile Media
- Uses integrated circuits. USB flash drive
- Connects to the computer via a USB port.
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Merci Beaucou
p !Presented by:
Tisha Corraine Huertas