Secondary Storage

File compression

File compression is to compressed a data into a file and reduce the storage requirements. For example, when a person need to send a lot of data to a another person through MSN or e-mails they will first compressed it into a file and then only send it to the person.

Head crash

A head crash is a physical destruction of a hard disk. It is due to misalignment, faulty parts, contamination with dust, as well as excessive jostling and temperatures, can cause the read/write head to collide with the disk's recording surface.

Internet hard drive

The internet hard drive allows us to store our files and data in it. It is a free drive space which we do not have to pay for it and the storage is not big enough which is not more than 2GB. You will have to purchase extra hard disk space if you need more than what they give you for free. They are supported by advertising and Internet companies.

Optical disc drive

Optical disc drive is to store digital data, images, music, text and etc. It is also a direct access storage device that is written and read by light. The optical disc can store up to 50GB file. The most common optical discs in use are CDs and DVDs. It is an advantage as it will not cause head crashes or corruption from stray magnetic fields.

Solid-state storage

The solid-state storage is a nonvolatile and removable storage medium. Examples of solid-state storage would be memory card and USB such as in cameras, mobile phones, digital video camera and etc. Many people use this solid-stage storage is because that it does not have moving parts and it also portable.

Input and Output

Erganomic Keyboard

Erganomic keyboard helps to relief painful conditions such as carpal tunnel syndrome that results form extended keyboard usage. It also helps to release stress on the fingers and arms. It is more comfortable than the standard flat keyboard. It is highly recommended for typist.

Ink jet printer

An ink jet printer is a type of printer that works by spraying some ionized ink at a sheet of paper and it also produce high quality print which is produced by laser printers. The ink jet printer is popular due to it is a prtable printer.

Laser printer

A laser printer is a printer that focused beam or light to transfer text and images onto paper but it does not actually burn the images on the paper. Laser printer does not use ink so they have less image smearing problems than inkjet printers and it is able to print even faster.

Magnetic-ink character recognition

MICR is a character recognition technology used primarily by the banking industry to facilitate the processing of cheques. It allows the computer to read iinformation such as printed documents. MICR is enable to read reliably even if they have been overprinted or obscured by other marks, such as cancellation stamps and etc.

Optical-character recognition (OCR)

OCR is a software that converts letters and numbers that are non-editable into a format that can be edited. It can also converts an article into Microsoft documents and then it can change it to any other words. OCR can be used for processing checks, archiving library material, and letter sorting by the postal office.

Optical-mark recognition

It is a type of technology that electronically extracting intended data from marked fields, such as checkboxes and fill-infields, on printed forms and so on. OCR reads and scans the information and datas where marks are made on the form. OCR is very useful in hand filled forms such as surveys, reply cards and etc.

The System Unit

Flash Memory

Flash memory also known as flash RAM. It is a type of constantly-powered nonvolatile memory that can be erased and reprogrammed in units of memory called blocks. It is often used to hold control code such as the basic input/output system in a personal computer. Flash memory is used in digital cellular phones, digital cameras, LAN switches, PC Cards for notebook computers, digital set-up boxes, embedded controllers, and other devices.

Graphic cards

A graphics card is a device installed in a computer that consists of a graphics processing unit designed to help process and display images, especially 3D graphics. Graphics cards help take the processing strain off the main processor, and can contain their own memory to take the strain off the system RAM.

Sound cards

An expansion board that enables a computer to manipulate and output sounds. Sound cards are necessary for nearly all CD-ROMs and have become commonplace on modern personal computers. Sound cards enable the computer to output sound through speakers connected to the board, to record sound input from a microphone connected to the computer, and manipulate sound stored on a disk.

Network interface card (NIC)

The network interface card makes the connection between the computer and the network cable.It is in the form of circuit card that is installed in an expansion slot of a computer, to provide network access. It contains the hardware to support certain network types, such as 10BaseT Ethernet or a token ring type network. 

Plug & Play

Plug & Play somtimes also known as PnP, it is a catchy phrase used to describe devices that work with a computer system as soon as they are connected. It usually refers to computer peripheral devices, such as keyboards and mice, it can also be used to describe internal hardware.

Bus line

The bus lines are the communicating electronic lines that connect different parts of the CPU to various other parts. In addition, the bus lines also link the CPU to different parts on the system board of your computer. The data flows in the form of bits along the bus lines. The bus lines are like multilane pathway which means that the more bus lines are on the system the greater is the rate of transfer of data along the bus, which means that the computer can run efficiently and will perform the operations at a faster rate.

HDMI

HDMI stands for high definition multimedia interface. It is a compact audio/video interface for transmitting uncompressed digital data. HDMI supports, on a single cable, any uncompressed TV or PC video format, including standard, enhanced, and high-definition video.

Cache memory

A small block of high-speed memory (usually SRAM) located between the CPU and main memory that is used to store frequently requested data and instructions. Properly designed, a cache improves system performance by reducing the need to access the system's slower main memory for every transaction.