Tuesday, January 18, 2011

Input and output


Ergonomic Keyboard
An ergonomic keyboard is a keyboard that have been designed with ergonomic considerations to minimize muscle strain and a host of related problems.

Ink-jet printer
An inkjet printer is a printer that propels variable-sized droplets of ink onto paper. Inkjet printers are the most commonly used type of printer by many people.

Laser printer
A laser printer is printer that produces high quality text and graphics on plain paper at a high speed.

magnetic-ink character recognition(MICR)
A character recognition technology that is used mostly by the people in the banking industry. This technology allows computers to read information from printed documents.

Optical-Character recognition(OCR)
A mechanical or electronic translation of scanned images writings or printed text into machine-encoded text. It is usually used to convert books and documents into e-books and e-documents.

Optical-mark recognition 
 A process of reading data from document forms such as surveys and tests.

Secondary Storage

File Compression
A process of encoding information using fewer bits. It can be used to compress or shrink a file
Head Crash
A head crash is a hard disk failure that occurs when a read-write head of a hard disk drive touches its rotating platter, resulting in permanent and usually fatal damage to the magnetic media on the platter surface


Internet hard Drive
Internet hard drive offers a means of accessing computer files from any computer, as long as that computer has access to the Internet



Optical Disc drive
Optical disc drive is a disk drive that uses laser light or electromagnetic waves near the light spectrum as part of the process of reading or writing data to or from optical discs.


Solid-state storage
A data storage device that uses solid-state memory to store persistent data

Wednesday, January 5, 2011

The System Unit

Flash Memory
It can be called as Flash RAM. It is a type of constantly-powered nonvolatile memory that can be erased and reprogrammed in units of memory called blocks. Flash memory is often used to hold control code such as the basic input/output system (BIOS) in a personal computer.





 
 Graphic cards
Graphics cards, also known as video cards, graphics accelerators or display cards are computer hardware that takes binary data.The data compressed into a system of just two digits, 1s and 0s and it then converts this data into images that are displayed on the computer's monitor



 Sound cards
A sound card is also refered as an audio card. It- is a peripheral device that attaches to the ISA or PCI slot on a motherboard to enable the computer to input, process, and deliver sound.








Network Interface Card(NIC)
A network interface controller is a computer hardware component that connects a computer to a computer network. The controller may also be referred to as a network adapter, or a LAN adapter







Plug & Play
Plug and Play, sometimes, abbreviated PnP, is a catchy phrase is used to describe devices that work with a computer system as soon as they are connected. The computer automatically recognizes the device, loads new drivers for the hardware if needed, and begins to work with the newly connected device.

Bus Line
A collection of wires through which data is transmitted from one part of a computer to another. You can think of a bus as a highway on which data travels within a computer.

HDMI
HDMI (High-Definition Multimedia Interface) is a compact audio/video interface for transmitting uncompressed digital data. It is a digital alternative to consumer analog standards.







Cache Memory
Cache memory is random access memory (RAM) that a computer microprocessor can access more quickly than it can access regular RAM. As the microprocessor processes data, it looks first in the cache memory and if it finds the data there.

Tuesday, December 14, 2010

The internet, The WEb and electronic commerce

Javascript
The JavaScript is an object-oriented scripting language used to enable programmatic access to objects within both the client application and other applications.



Applets
An applet is any type of small application that performs one specific task. It can be a Java application, an application program that uses the client's web browser to provide a user interface


Filters
A filter is a computer program to process a data stream.
Examples:
  • find "keyword" < inputfilename > outputfilename
  • sort "keyword" < inputfilename > outputfilename
  • find /v "keyword" < inputfilename | sort > outputfilename
It can filter out unwanted things like spams or virus.



Plug-ins
A computer program module or device that interacts with another to add a specific function, or to support a specific file format or device; Designed to be plugged into an electrical power outlet or circuit

Internet Security Suite
computer security software that helps out with protecting the computer from viruses, spyware, and having a firewall protection.
FTP(file transfer protocol)
(File Transfer Protocol) is a procedure of transferring files from our local computer to the web server. There are many free ftp software programs available on the Internet and they can update website pages at any given time.
FTP is an old and the protocol itself has no security,

Wiki
An website that allows easy creation and editing of any number of interlinked web pages from a web browser using a simplified markup language.

URL
Uniform Resource Locator is a subset of the Uniform Resource Identifier. It refers to a resource on the Internet, specifying a protocol, a computer, a file on that computer, and parameters.

Tuesday, December 7, 2010

Careers in IT

Webmasters :

Definition and Nature of the Work
What is a webmasters?
A webmaster is a person who is in charge of maintaining a Web Sites for companies and individuals on the world Wide Web. This is a job that requires a person to have a wide range of skills and abilities, since many webmasters must do much more than simply write computer codes or update links to other Web sites.




Computer support specialist :

Definition and Nature of the Work
What are Computer Support Specialist?
Computer support specialists are people that help people with computer problems. Some of the computer support specialists are called help-desk technicians field phone calls or e- mails or make house calls for people who are having difficulty with a particular piece of computer hardware or software.




Technical writer

Definition and Nature of the Work
Technical Writers? What do they do?
Technical writers explain in simple language scientific and technical ideas that are difficult for the normal readers to understand. Some pf them write articles and reports on current trends in fields such as science and engineering. Technical writers also work for book, magazine, or newspaper publishers, or they may be employed in other industries.




Software engineer

Definition and Nature of the Work
Computer software engineers are people that develop and maintain computer software programs, which are coded instructions that tell the computer what to do in logical steps(Binary Codes). They work in manufacturing, industry, engineering, government offices, and educational institutions. Sometimes they upgrade the computer that are being used.





Network administrator
Definition and Nature of the Work
Network administrator or to say in a simpler form, Network Admins.
They are people who oversees computer networks to ensure that they function smoothly. They may be responsible for customizing the network to an individual company's needs by connecting the necessary hardware and software to the network. Once the network is configured, the administrator adds computer programs, such as e-mail, that the company's employees use on a daily basis.




 

System analyst
Definition and Nature of the Work
Computer systems analysts analyze business or scientific tasks and plan and develop the hardware systems and software that allow a computer to complete these tasks. They are also sometimes called as systems analysts, may also work on improving computer systems already in use. 
 





Programmer
Definition and Nature of the Work
Computer programmers are people who writes the step-by-step instructions that direct computers to process information by key-ing in binary codes and are made into programs. These instructions, or programs can be used to tell the computer what to do in a series of logical steps.






Lastly for laughs
Jobless and Homeless person
Definition and Nature of the Work
People who does not have any jobs and has lost their place to stay due to their failure in life.