Assignment: STORAGE DEVICES (Dec. 05, 2010)

Storage Devices

Hard Disk Drive

*A hard disk drive (HDD) is a non-volatile, random access device for digital data. It features rotating rigid platters on a motor-driven spindle within a protective enclosure. Data is magnetically read and written on the platter by read/write heads that float on a film of air above the platters.

Ram

*RAM is the most common type of memory found in computers and other devices, such as printers.

There are two different types of RAM: DRAM (Dynamic Random Access Memory) and SRAM (Static Random Access Memory).

Blue tooth

* gives you a wireless connection between your PC and device. Note that not all computers have built-in Bluetooth. You can however use the data cable or infrared connection instead to make the connection.

CD + RW Disc

*(Compact Disc Rewriteable) - This disc looks like a regular CD. The only difference is that you can write on this disc and erase it as many times as you want. It works just like a floppy disk or a zip disk. A CD + RW disc holds about 650 MB.

 

CD + R Disc

 

*(Compact Disc Recordable) - This one is a CD that you can record on. It’s mostly used to record audio and once it's been written on, you cannot rewrite or erase anything off of it. This compact disc comes in different sizes, but they are usually silver in color.

 

Assignment: OUTPUT DEVICES (Dec. 05, 2010)

OUTPUT DEVICES

 

Monitor

*The monitor is your view into the computer. They come in all shapes and sizes, but the main ones being sold today are LCD (Liquid Crystal Display) monitors. There's quite a big difference between LCD and CRT (Cathode Ray Tube) monitors and CRT monitors are slowly being phased out and replaced by LCD's. LCD monitors are much lighter and thinner, they take up less space, and provide a crisper more focused image.

 Speaker

*Independent speakers when attached to the computers can really make listening music or playing multimedia games a really good experience. Different types of speakers include the standard 2-speakers, 2.1 speakers with 1 sub-woofer, 4.1 speakers, and 5.1 speakers.

Printer

 

*A computer printer is another type of output device. Many modern printers have the ability to interface with different media types such as memory sticks, memory cards, and cameras. 

Projector

*A video projector is a device that receives 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.

Scanner

*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.
 

Assignment: INPUT DEVICES (Dec. 05, 2010)

INPUT DEVICES:

                                                                          

                                                                          Keyboard

* The device used to encode data into computer of which keys are modeled after the typewriter keyboard.

                                                                            Mouse

  * Computer mouse is a navigational input for users who want an alternative for keyboard.

                                                                        Web camera

* Webcam is a camera connected to a PC or server allowing the users to share pictures or videos across the internet. 

                                                                  Microphone

* A microphone allows you to record sounds and voices to your personal or office computer. The sound card back plate is used to connect the microphone component to the 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. 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.