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System Unit

7:50 PM |

Random-access memory (RAM): It is a type of storage for computer data. It is a non-permanant memory storage. Therefore, if one is accessing a website and the power supply is cut off, when the computer is switched on again, the website will not be opened anymore. The random-access memory is volatile.








Cache:  It stores data transparently to aid in the speed of launching a program or application later. In speeds up the process of loading a program or an application. Cache is usually small. For example, during the first time of loading a certain website such as http://www.google.com/, it would take some time for it to load on the page. However, after opening http://www.google.com/ for a few times, you will realize the website loads faster than when you first started opening the website.



Read-only memory (ROM): A memory storage in computers which cannot be altered or can be altered at a low speed or with complications. It is to distribute firmwares which are softwares connected closely to hardwares. The data is permanantly stored in the memory. It is a non-volatile memory.






Flash Memory: Flash memory can be altered and it is volatile. Flash memories are mainly used as mobile storage for information and data such as documents and songs or videos. It is usually small and portable. Easy handling and easy to carry around. The small flash memory can go up to 8GB memory space.




Graphic Card:  Also known as a video card, video adapter, graphics accelerator card or display adapter. The graphic card boosts the quality of the visuals on the computer such as on games and videos where it becomes more realistic. Mainly 3D effects.





Sound card: Otherwise known as a audio card is used to boost the computers capability of sound output to the user. This sound card aids in prodicing better sound and a more quality sound effect without static noise. It usually has a good external noise cancelation. It can boost the treble or bass of a song / sound clip according to one's preference. It helps when composing music, video or audio editing.



Network Interface: A network interface is the computer connecting to a computer network. It allows communication between computers connected to the same LAN. Whereas, larger communication takes place through routable protocol, IP.






Plug and play: This facility is when you connect a hardware to the computer and no configuration, set-up is needed or user intervention in resolving resource conflicts. It makes things simpler and faster.











Universal Serial Bus port (USB): The USB was created to make all connections of hardwares generalized. Nowadays the mouse, keyboard, printers and other hardwares to connect to the computer uses the USB port. It is easily available in the market to get a USB mouse and such. The USB has replaced ports such as the serial port and parallel port.







Serial Port: It is used to transfer data to the computer devices such as terminals and other types of peripherals. Devices which used to connect to this port has now been replaced by the USB.





Parallel Port: A type of interface which connects devices to the computer. This port has been replaced by the USB.










Firewall Port:  Is to allow connection from the internet to the computer.








Ethernet Port: A networking LAN. It defines numerous of wiring and signaling of the Physical Layer. It is also the general addressing format and types of Media Access Control procedures at the lower part of the  Data Link Layer.








High Definition Multimedia Interface (HDMI): It is an interface for audio and video for transmitting non-compressed digital data. It is mainly for games and graphics with sounds. It betters the quality and makes the effect nicer.

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The Internet, the Web and Electronic Commerse

1:21 PM |

Uniform Resource Locator (URL): Also known as Uniform Resource Identifier (URI). It locates the accessible resource and the gadget for finding it. [The best-known example of the use of URLs is for the addresses of web pages on the World Wide Web, such as http://www.example.com/] (taken from http://en.wikipedia.org/wiki/URL)






HyperText Markup Language (HTML): The elements contains tags, encased with angle brackets (like <html>). The tags usually come in pairs (e.g. <h2> or </h2>). The beginning is the 1st tag and the end is the 2nd tag, also known as the opening and closing tags. The function of a web browser is to interpret HTML documents and design them into imaged and sounding web pages. Web designers are able to include text and images. It enables images and objects to be embedded develop interactive forms.





JavaScript: Otherwise known as ECMAScript a prototype-based, object-oriented scripting language that is productive, weakly written and has superior purposes. JavaScript accommodates improved user interfaces and productive websites. It hosts an environment that allows programmatic access to computational objects. JavaScript has its usage in external applications. (E.g. PDF documents, desktop widgets, specific browsers). 



 
Applets: A small application that engages a particular duty that runs within a scope of a more complex program, frequently identified as a plug-in. 










Blogs: It is a combination of the word web log. It is a kind of website where it is maintained by an individual with constant updates of posts of things such as events, food, places, among others.Blogs may be personal, as in private, or open for the public to read. Most blogs are about an individual's every day life. Some of course, specializes in a certain category such as cars, make-up, food, drinks and places to visit. Usually the public may access the blog and also comment on the posts, video or photos. The blog posts are usually posts in the order that the latest post will be on top, and the older posts are at the bottom. A conventional blog contains texts, images and videos. Some, posts links to other sites where the readers can click the link to the website.




Wikipedia: It is a chargeless, unprofitable, multilingual, cooperative published document by global volunteers. It has 281 languages. Anyone who has access to the wikipedia throught the internet can alter its contents. It is a typical site for reference of anything. It is ranked the top 10 among all the websites on Alexa. Wikipedia has had 365 million readers.




















Plug-in: Plug-ins are add-ons to the computer software to boost the performance of the computer such as anti-virus, video player, and to view certain format of a data. Plug-ins customizes the software or applications in the computer. Plug-ins can be used to decrease the size of an application to save memory space. Plug-ins also aid in encoding, decoding, encrypting and decrypting data or new formats.










Filter: Filter is a program to process a data stream. Filter is mainly used in searches. Filter can be seen in many situations. Firstly, filter is used as a child lock. This is to prevent underage children from viewing obscene images, videos or sites such as pornography or horror genre. Secondly, a filter can be used to find a certain e-mail, image or video in the internet rather than scrolling through the net one by one. For example, go to a search website like http://www.google.com/ and type "phones", the list of site of phones will be listed.



Internet security: It is a type of safety taken to prevent intrusion from anyone from cyberspace. Certain important details and information such as bank accounts and credit card numbers can be leaked out into the internet if safety precautions are not taken.









Suite: A suite such as the Microsoft Office Suits 2010 is a compilation of the Microsoft softwares such as Microsoft Word, Microsoft Excel, Microsoft PowerPoint, Micrisoft Publisher and Microsoft Project. This type of suite is compiled to allow a cheaper pricing of the software as buying the softwares individually will costs a bomb.

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Professions in Information Technology

6:28 PM |

Webmasters are also referred as  web architect, web developer, site author, website administrator, or webmistress for females. This person holds responsible on maintaining website(s). Webmasters are to safeguard the web servers, hardware and software are running flawlessly, designing the website, generating and revising web pages, replying to user comments, and examining traffic through the site.





Computer support specialist, also know as technical support. It is a range of services giving aid to technology and electrical products such as mobile phones, computers, software and other machanism. These specialist help users of the item with any trouble they are having. A large group of companies provide technical support for the products they sell. Sometimes for free or for a fee.






A technical writer is also known as a technical communicator. These techincal writers are proficient in designing, creating, and preserve technical documentation. Such documentations accomodates online assistance, user advice, white papers, system manuals, design specifications, apart from other files. They handle proofreading, editing, and formatting. A technical writer produces technical documentation for technical, business, and consumer audiences.





A software engineer uses the principles of software engineering design, examine, establish and evaluation of the software and systems assembles computers or anything containing software like computer chips to function.






A network administrator is a person responsible for the maintenance of computer hardware and software that accomodates a computer circuitry. They usually do not work with direct user support. Their main objective is on the perfection of the network. They are to make sure the network connectivity is up to date with the technical status. They are recognized as tier 3 support personnels in an organization.  A problem goes through the tier 1 and tier 2 of the organization before it reaches a network administrator's hand. They also compose and deploy networks.










A database administrator (DBA), also known as Database Coordinator or Database Programmer, is accountable for the compose, application, sustenance and restoration of an organization or company's database. A DBA is associated to a Database Analyst, Database Modeler, Programmer Analyst, and Systems Manager. The job of a DBA involves the advancement and construction of database strategies, keep track of and cultivating the database performance. They are to secure the database in the organization they work for.












System analyst utilizes IT tools equipments in their motive to achieve their duty. They work closely with hardwares and softwares to improve the computer systems. System analysts are to go through the process of trial and error a new system by scratch. Organizations hire these professions to decide and select which decent software or hardware that meets up to the requirements of organization. Financial budget is also needed to take into consideration when selecting or creating a software system. These specialists are the ones who decide how the system works 
and how it is processed.




A programmer, also known as a computer programmer or coder is a specialist who invents computer software. Programmers have their own language in the sense of prefixes associated with the web. They write codes for various softwares. 

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