Blog # 2 Part 1 External Parts of a Computer

Parts of a Computer (External)

Keyboard - A keyboard 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

Mouse - A mouse is a pointing device that functions by detecting two-dimensional motion relative to its supporting surface.

Computer Speaker - A Computer speakers, or multimedia speakers, are speakers external to a computer, that disable the lower fidelity built-in speaker. They often have a low-power internal amplifier

Computer Monitor - A monitor or display (sometimes called a visual display unit) is an electronic visual display for computers.

Microphone - An instrument capable of transforming sound waves into changes in electric currents or voltage, used in recording or transmitting sound.

System Unit - A system unit, also known as a base unit, is the main body of a desktop computer, typically consisting of a plastic enclosure containing the motherboard, power supply, cooling fans, internal disk drives, and the memory modules and expansion cards that are plugged into the motherboard, such as video and network cards.





Computer Case - A computer case (also known as a computer chassis, cabinet, box, tower, enclosure, housing, '"system unit'" or simply case) is the enclosure that contains the main components of a computer. A computer case is sometimes incorrectly referred to metonymously as a CPU or hard drive referring to components housed within the case. CPU was a more common term in the earlier days of home computers, when peripherals other than the motherboard were usually housed in their own separate cases.







Printer - In computing, 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.






Scanner - In computing, a scanner is a device that optically scans images, printed text, handwriting, or an object, and converts it to a digital image.




Mouse Pad - A mousepad (US) or mouse mat (UK) is a surface for enhancing the usability of a computer mouse.







Web Cam - A webcam is a video capture device connected to a computer or computer network, often using a USB port or, if connected to a network, ethernet or Wi-Fi.






Modem - A modem (modulator-demodulator) is a device that modulates an analog carrier signal to encode digital information, and also demodulates such a carrier signal to decode the transmitted information. The goal is to produce a signal that can be transmitted easily and decoded to reproduce the original digital data. Modems can be used over any means of transmitting analog signals, from driven diodes to radio.






CD or Compact Disk - A Compact Disc (also known as a CD) is an optical disc used to store digital data.






Floppy Disk or Diskette - A floppy disk is a data storage medium that is composed of a disk of thin, flexible ("floppy") magnetic storage medium encased in a square or rectangular plastic shell.





USB Flash Drive - A USB flash drive consists of a flash memory data storage device integrated with a USB (Universal Serial Bus) 1.1 or 2.0 interface. USB flash drives are typically removable and rewritable, and physically much smaller than a floppy disk. Most weigh less than 30 g (1 oz). Storage capacities in 2010 can be as large as 256 GB with steady improvements in size and price per capacity expected. Some allow 1 million write or erase cycles and have a 10-year data retention cycle.





External Hard disk - An external hard disk drive is a type of hard disk drive which is connected to a computer by a USB cable or other means. Modern entries into the market consist of standard SATA, IDE, or SCSI hard drives in portable disk enclosures with SCSI, USB, IEEE 1394 Firewire, eSATA client interfaces to connect to the host computer.




Headset - A headset is a headphone combined with a microphone. Headsets provide the equivalent functionality of a telephone handset with hands-free operation. Headsets typically have only one speaker like a telephone, but also come with speakers for both ears.[1] They have many uses including in call centers and other telephone-intensive jobs and for personal use at the computer to facilitate comfortable simultaneous conversation and typing.





Computer Desk - The ergonomic desk and related computer desk are furniture pieces designed to comfortably and aesthetically provide a working surface and house or conceal office equipment including computers, peripherals and cabling for office and home-office users.





Patch Cable - A patch cable or patch cord (sometimes patchcable or patchcord) is an electrical or optical cable, used to connect ("patch-in") one electronic or optical device to another for signal routing.

Power Cord

Monitor Power Adaptor Cord

Power Cord - A power cord, line cord, or mains cable is a cord or cable that temporarily connects an electrical appliance to the distribution circuits of an electrical power source via a wall socket or extension cord.






Router - is a device that interconnects two or more computer networks, and selectively interchanges packets of data between them.






Ethernet Hub - An Ethernet hub, active hub, network hub, repeater hub or hub is a device for connecting multiple twisted pair or fiber optic Ethernet devices together and making them act as a single network segment. Hubs work at the physical layer (layer 1) of the OSI model. The device is a form of multiport repeater. Repeater hubs also participate in collision detection, forwarding a jam signal to all ports if it detects a collision.






Video Projector - A video projector takes a video signal and projects the corresponding image on a projection screen using a lens system. All video projectors use a very bright light to project the image, and most modern ones can correct any curves, blurriness, and other inconsistencies through manual settings. Video projectors are widely used for conference room presentations, classroom training, home theatre and live events applications. Projectors are widely used in many schools and other educational settings, connected to an interactive whiteboard to interactively teach pupils.

USB Gamepads

Gamepad -A gamepad (also called joypad or control pad), is a type of game controller held in the hand, where the digits (especially thumbs) are used to provide input. Gamepads generally feature a set of action buttons handled with the right thumb and a direction controller handled with the left. The direction controller has traditionally been a four-way digital cross (also named a joypad, or alternatively a D-pad), but most modern controllers additionally (or as a substitute) feature an analog stick.

AV receiver - AV receivers or audio-video receivers are one of the many consumer electronics components typically found within a home theatre system. Their primary purpose is to amplify sound from a multitude of possible audio sources as well as route video signals to your TV from various sources. The user may program and configure a unit to take inputs from devices such as DVD players, VCRs etc. and easily select which source he wants to route to his TV and have sound output for.