Blogger Templates by Blogcrowds

The Internet, The Web and Electronic Commerce

0 comments Posted by evelynwng at 6:06 PM








URL
Uniform Resource Locator (URL) is a Uniform Resource Identifier (URI) that specifies where a known resource is available and the mechanism for retrieving it. The best-known example of the use of URLs is for the addresses of web pages on the WORLD WIDE WED, such as http://www.example.com/

The first part of the address is called a protocol identifier and it indicates what proto

col to use, and the second part is called a resource name and it specifies the IP address or the domain name where the res

ource is located. The protocol identifier and the resource name are separated by a colon and two forward slashes.

For example, the two URLs below point to two different files at the domain pcwebopedia.com. The first specifies an executable file that should be fetched using the FTP protocol; the second specifies a Web page that should be fetched using the HTTP Protocol.

HTML

HTML is a language for describing web pages. HTML stands for Hyper Text Markup La

nguage. HTML is not a programming language, it is a markup language. A markup language is a set of markup tags. HTML uses markup tags to describe web pages.

The purpose of a web browser is to read HTML documents and compose them into visual or audible web pages. The browser does not display the HTML tags, but uses the tags to interpret the content of the pag

e.

HTML elements form the building blocks of all websites. HTML allows images and documents to be embedded and can be used to create interactive forms. It provides a means to create stru

ctured document by denoting structural semantics for text such as headings, paragraphs, lists, links, quotes and other items. It can embed scripts in languages such as Java Script which affect the behavior of HTML webpages.



JAVA SCRIPT

A scripting language developed by Netscape to enable Web authors to design interactive sites. Although it shares many of the features and structures of the full Java language, it was developed independently. Javascript can interact with HTML source code, enabling Web authors to spice up their sites with dynamic content. JavaScript is endorsed by a number of software companies and is an open language that anyone can use without purchasing a license. It is supp

orted by recent browsers from Netscape and Microsoft, though Internet Explorer su

pports only a subset, which Microsoft calls Jscript.

JavaScript gives HTML designers a programming tool is HTML authors are normally not programmers, but JavaScript is a scripting language with a very simple syntax! Almost anyone can put small "snippets" of code into their HTML pages.


APPLETS

A program designed to be executed from within another application. Unlike an application, applets cannot be executed directly from the operating system. With the growing popularity of OLE (object linking and embedding), applets are becoming more prevalent. A well-designed applet can be invoked from many different applications.

Web browsers, which are often equipped with Java virtual machines, can interpret applets from Web servers. Because applets are small in files size, cross-platform compatible, and highly secure (can't be used to access users' hard drives), they are ideal for small Internet applications accessible from a browser.


BLOGS

A frequent, chronological publication of personal thoughts and Web links. A blog is often a mixture of what is happening in a person's life and what is happening on the Web, a kind of hybrid diary/guide site, although there are as many unique types of blogs as there are people. People maintained blogs long before the term was coined, but the trend gained momentum with the introduction of automated published systems, most notably Blogger at blogger.com. Thousands of people use services such as Blogger to simplify and accelerate the publishing process. Blogs are alternatively called web logs or weblogs. However, "blog" seems less likely to cause confusion, as "web log" can also mean a server's log files.

WIKIS

The simplest online database that could possibly work. Wiki is a piece of server software that allows users to freely create and edit Web page content using any Web browser. Wiki supports hyperlinks and has a simple text syntax for creating new pages and crosslinks between internal pages on the fly. Wiki is unusual among group communication mechanisms in that it allows the organization of contributions to be edited in addition to the content itself. Like many simple concepts, "open editing" has some profound and subtle effects on Wiki usage. Allowing everyday users to create and edit any page in a Web site is exciting in that it encourages democratic use of the Web and promotes content composition by nontechnical users.

FTP

FTP allows you to transfer files between two computers on the Internet. FTP is a simple network protocol based on Internet Protocol and also a term used when referring to the process of copying files when using FTP technology.

To transfer files with FTP, you use a program often called the "client." The FTP client program initiates a connection to a remote computer running FTP "server" software. After the connection is established, the client can choose to send and/or receive copies of files, singly or in groups. To connect to an FTP server, a client requires a username and password as set by the administrator of the server. Many public FTP archives follow a special convention for that accepts a username of "anonymous."

PLUG IN

Plug-in applications are programs that can easily be installed and used as part of your Webbrowser. Initially, the Netscape browser allowed you to download, install, and define supplementary programs that played sound or motion video or performed other functions. These were called helper applications. However, these applications run as a separate application and require that a second window be opened. A plug-in application is recognized automatically by the browser and its function is integrated into the main HTML file that is being presented.

Among popular plug-ins to download are Adobe's Acrobat, a document presentation and navigation program that lets you view documents just as they look in the print medium, RealNetworks' streaming video player, and Macromedia's Shockwave for DIrector, an interactive animation and sound player. There are now hundreds of possible plug-ins. Most users wait until they need a particular plug-in before they download it.

FILTER

A program that accepts a certain type of data as input, transforms it in some manner, and then outputs the transformed data. For example, a program that sorts names is a filter because it accepts the names in unsorted order, sorts them, and then outputs the sorted names.

Utilities that allow you to import or export data are also sometimes called filters.

A pattern through which data is passed. Only data that matches the pattern is allowed to pass through the filter.

In paint programs and image editors, a filter is an effect that can be applied to a bit map. Some filters mimic conventional photographic filters, but many transform images in unusual ways. A pointillism filter, for example, can make a digitized photograph look like a pointillistic painting.

 

Careers in IT

0 comments Posted by evelynwng at 5:23 PM



WEBMASTER
A webmaster is the leader of maintaining Web sites for companies and individuals on the World Wide Web. This job requires a wide range of skills and abilities. For someone to be a good webmaster, the first need to learn how to design a website. Designing a website is like designing a dwelling house. Webmasters have responsibilities such as ensuring that a website is easy to navigate and that it addresses the needs of the client and its customers.


COMPUTER SUPPORT SPECIALIST
Computer support specialist is a job where they help people use computers. Whenever something goes wrong, support specialist figure out why and they then fix it. Computer support specialist also install printers, software and computing tools. They share their skills by teaching them to others or writing instruction books. A day as a computer support specialist, you can learn many things. You take the job of answering user inquiries regarding computer software or hardware operation to resolve problems.


TECHNICAL WRITER
Technical writers are also called as technical communicators who put technical information into easily understandable language. Technical writers apply their knowledge of the user of their product, they may serve as part of a team conducting usability studies to help improve the design of a product that is in the prototype stage. Technical writers use computers and other electronic communications equipment extensively in performing their work.



SOFTWARE ENGINEER
A software engineer is an engineer who applies the principles of software engineering to the design, development, testing, and evaluation of the software and systems that make computers or any containing software, such as computer chips and work. Software engineers design and develop many types of software, including computer games, business applications, operations systems and etc.
They must be experts in the theory of computing systems, the structure of software and the nature and the limitations of hardware to ensure that the underlying systems will work properly.



NETWORK ADMINISTRATOR
A network administrator is someone who is responsible for the maintenance of computer hardware and software that comprises a computer network. The actual role of this person is to vary from company to company but will include activities and tasks such as network address assignment, assignment of routing protocols and routing table configuration. They are also responsible for the security of the network and for assigning the IP addresses to devices connected to the network.


DATABASE ADMINISTRATOR
A person responsible for the design, implementation, maintenance and repair of an organization's database is called a database administrator. They are also known by the titles Database Coordinator or Database Programmer, and is closely related to the Database Analyst, Database Modeler, Programmer Analyst, and Systems Manager. The role includes the development and design of database strategies, monitoring and improving database performance and capacity, and planning for future expansion requirements. They may also plan, co-ordinate and implement security measures to safeguard the database. Database administrators must be able to think logically. Being able to concentrate and pay close attention to detail is important. There is no single way to prepare for a job as a database administrator.

SYSTEM ANALYST
System analyst job is to figure out how to use computers to get things done. They tell businesses and other organizations which computers and software to buy, and they decide how to get those tools to work together. Computer systems analysts start their work by asking people what they need their computers to do. Then, they plan a computer system that can do those tasks well. A system can include many computers working together and different types of software and other tools. A system analyst must plan a system flow from the ground up, interact with customers to learn and document requirements that are then used to produce business requirements documents and etc.


PROGRAMMER
A programmer, computer programmer or coder is someone who writes computer software. The term computer programmer can refer to a specialist in one area of computer programming or to a generalist who writes code for many kinds of software. One who practices or professes a formal approach to programming may also be known as a programmer analyst. Computer programmers write, test, debug, and maintain the detailed instructions, called computer programs, that computers must follow to perform their functions.

 

Newer Posts Home

Subscribe to: Posts (Atom)