Input and Output

Ergonomic Keyboard


          Is also called "Natural Keyboard".


          Ergonomic keyboard is the standard keyboard will be provided for the left hand fingering and right hand keypad keypad which is about two blocks apart, and formed a certain angle, so that operators do not have a sense of clamping arms, maintain a more natural form This keyboard is designed for Microsoft named Natural Keyboard, comfortably, for the habits of the user can effectively reduce the right-hand man mistakenly hit rate of key areas, such as the letter "G" and "H".   








Ink-jet Printer


           Ink-jet printers can be divided by the working principle of solid and liquid ink-jet ink of two (the latter is more common now ), while the liquid inkjet canon can be divided into gas and hp and epson. bubble jet nozzle by heating, so that the ink bubbles, spray on to the print media.





 Laser Printer


        Using laser scanning imaging technology, computing technology, electronic photography, high-quality printing equipment.


        A print engine in which a laser is used to expose an image on a photoconductive drum or belt by discharging blank areas. The belt is then toned with a charged toner which is then transferred to the paper and fused there by heat and pressure.








Magnetic-ink character reader( MICR )


       Magnetic Ink Character Recognition, or MICR, is a character recognition technology used primarily by the banking industry to facilitate the processing of cheques.The technology allows computers to read information (such as account numbers) off of printed documents.
        
       Unlike barcodes or similar technologies, however, MICR codes can be easily read by humans. MICR characters are printed in special typefaces with a magnetic ink or toner, usually containing iron oxide.






 Optical-character recognition (OCR)


    
     Optical character recognition, usually abbreviated to OCR, is the mechanical or electronic translation of scanned images of handwritten, typewritten or printed text into machine-encoded text.
      It is widely used to convert books and documents into electronic files, to computerize a record-keeping system in an office, or to publish the text on a website. OCR makes it possible to edit the text, search for a word or phrase, store it more compactly, display or print a copy free of scanning artifacts, and apply techniques such as machine translation, text-to-speech and text mining to it.






 Optical-mark recognition (OMR)


    
     Optical Mark Recognition is the technology of electronically extracting intended data from marked fields, such as checkboxes and fill-in fields, on printed forms. It is generally distinguished from OCR by the fact that a recognition engine is not required.


     OMR technology scans a printed form and reads predefined positions and records where marks are made on the form. This technology is useful for applications in which large numbers of hand-filled forms need to be processed quickly and with great accuracy, such as surveys, reply cards, questionnaires and ballots.

Secondarty Storage

File Compression    

     A large file after compression, resulting in a smaller capacity of the file to another. And the smaller the file size, we call it the capacity of these large (and possibly one or more files) compressed files. The compressed file is called file compression.
     To use these compressed files, you must deal with these compressed files can be processed or executed restore the file format.

Hard Crash

       To my knowledge, hard crash means system crash.


       By the operational errors or viruses malicious software causes the computer not working properly, frequent crashes and other symptoms is called a system crash. Even if the collapse caused by the software, the best performance of the PC hardware is also inseparable from software support - also known as applications, operating systems and drivers.

Internet Hard Drive 

         When the network computer's disk as a shared data area allows network users to access, the drive to become a network drive. Sometimes use the network drive is to be limited, and that only authorized network users to the network administrator can access them. This drive can be a hard drive, CD-ROM drive, floppy disk drives. Similarly, the use of network drives and local drives is no different, just slower rate than local use.

Optical Disc Drive

      A storage medium from which data is read and to which it is written by lasers. Optical disks can store much more data -- up to 6 gigabytes (6 billion bytes) -- than most portable magnetic media, such as floppies.

Solid-State Storage

     Solid state memory is relative to the disk, CD-ROM for a class, no heads, no storage media movement (rotation) to read and write data in memory.

     Solid state memory storage chip through the switching transistors to store data in the state, because there is no solid state memory read-write head, do not rotate, so the solid-state memory with low power consumption, the advantages of strong earthquake.



System Unit

Flash memory

       Flash Memory is a long-lived, non-volatile (in the case of power outages can maintain the stored data) of memory, data deletion is not a single byte as a unit but as a fixed block as a unit, 256KB block size is generally to 20MB. Flash memory is a variant of e-erasable EEPROM, EEPROM and flash memory is different is that it can be removed at the byte level rather than the entire chip and rewrite the flash, so flash memory to update faster than EEPROM. Because of its power can still save the data when the flash is often used to save the settings information, such as in the computer's BIOS, PDA, digital cameras save information. 

Graphic cards

        A graphics processing unit or GPU (also occasionally called visual processing unit or VPU) is a specialized processor that offloads 3D graphics rendering from the microprocessor. It is used in embedded systems, mobile phones, personal computers, workstations, and game consoles.

Sound cards

       A sound card (also known as an audio card) is a Computer expansion card that facilitates the input and output of audio signals to and from a computer under control of computer programs. Typical uses of sound cards include providing the audio component for multimedia applications such as music composition, editing video or audio, presentation, education, and entertainment (games). Many computers have sound capabilities built in, while others require additional expansion cards to provide for audio capability.

Network interface care (NIC) 

          A network interface card (NIC) is a computer circuit board or card that is installed in a computer so that it can be connected to a network. Personal computers and workstations on a local area network (LAN) typically contain a network interface card specifically designed for the LAN transmission technology, such as Ethemet or token ring. Network interface cards provide a dedicated, full-time connection to a network. Most home and portable computers connect to the Internet through as-needed dial-up connection. The modem provides the connection interface to the Internet service provider.

Plug & Play 

          In the world of computing, plug and play is a term used to describe the characteristic of a universal serial bus, or device specification, which facilitates the discovery of a hardware component in a system, without the need for physical device configuration, or user intervention in resolving resource conflicts.

          Plug and play refers to both the boot-time assignment of device resources, and to hot plug systems such as USB and Fire wire^.

Bus line

          In computer architecture, a bus is a subsystem that transfers data between computer components inside a computer or between computers.

          Early computer buses were literally parallel electrical buses with multiple connections, but the term is now used for any physical arrangement that provides the same logical functionality as a parallel electrical bus. Modern computer buses can use both parallel and bit-serial connections, and can be wired in either a multidrug (electrical parallel) or daisy chain topology, or connected by switched hubs, as in the case of USB.

HDMI

          HDMI, High Definition Multimedia Interface is an all-digital video and audio transmission   interface, you can send uncompressed audio signals and video signals. HDMI can be used for set-top boxes, DVD players, personal computers, video games, integrated amplifier, digital audio and TV. HDMI can transmit audio and video signals, audio and video signals using the same cable, greatly simplifying system installation.

 

Cache memory

          Main memory size than the small but fast memory used to receive instructions from the main to keep a copy of - is likely needed for the processor in the next step - a dedicated buffer.

          Cache (Cache) its original meaning refers to the access speed than the average random access memory (RAM) a faster RAM, it generally did not use the system main memory DRAM technology, while expensive, but Faster SRAM technology, but also the name of the cache.