In operating systems, file extensions indicate the type of information stored in the file at the end of a filename. The filename EXAMPLE.TXT, is the extension for TXT, which is a file for text.
Graphics Interchange Format, a bit-mapped graphics file format used by the Web. GIF supports color and various resolutions. It is limited to 256 colors, and it's mainly used for scanned images such as illustrations rather than color photos.
Portable Document Format, a file format developed by Adobe Systems. A PDF makes it possible to send desktop related formatted documents to either be viewed, saved or printed.
is a sound and motion picture file that conforms to the Microsoft Windows Resource Interchange File Format (RIFF) specification. AVI files (which end with an .avi extension) require a special player that may be included with your Web browser or may require downloading.
is a commonly used method of date encoding for digital photography. The JPEG format can be saved for high quality purposes such as printing, medium quality for the Web and attaching to emails.
A MOV or .mov file is a movie file format sometimes referred to as the Apple QuickTime Movie Format. The .mov format is also the basis for the MPEG-4 format, which is widely used from YouTube to Blu-Ray.
is a patented digital audio encoding format using a form of lossy data compression. It is a common audio format for consumer audio storage and digital audio compression for the transfer and playback of music on digital audio players.
a type of data compression developed by the PKware company that is commonly used on Windows OS computers to reduce the amount of data need to represent a file.
Joint Photographic Experts Group, the committee that wrote the standard. JPG images support 16 million colors and are best suited for photographs and complex graphics. The information that is discarded in the compression is information that the human eye cannot detect.
Portable Network Graphics was developed as a patent-free answer to the GIF format. An image in a lossless PNG file can be more compressed than a GIF file of the same image. PNG builds on the idea of transparency in GIF images and allows the control of the degree of transparency.
(Small Web Format) The file format for playing Flash animation files (Flash movies). The Flash source file, which holds the timelines and multimedia elements, uses the .FLA (Flash Authoring) extension and is published to an .SWF file for playback by the Flash media player.
Structured Query Language is a database computer language designed for managing data in relational database management systems.
Self-referentially short for PHP: Hypertext Preprocessor, an open source, server-side, HTML embedded scripting language used to create dynamic Web pages.
Short for Extensible Hypertext Markup Language. XHTML is a XML application and is a hybrid of HTML and XML language.
Short for HyperText Markup Language, the authoring language used to create documents on the World Wide Web by using a variety of tags and attributes.
(Practical Extraction and Report Language) Perl is a programming language developed by Larry Wall, especially designed for processing text. Because of its strong text processing abilities, Perl has become one of the most popular languages for writing CGI scripts. Perl is an interpretive language, which makes it easy to build and test simple programs.
A high-level programming language developed by Sun Microsystems. An object-oriented programming language that is platform independent, Java is widely used on the Web for both client and server processing.
Founded and headed by Tim Berners-Lee in 1994. The consortium is made up of member organizations for the purpose of development of standards for the World Wide Web.
World Wide Web
A system of Internet servers that support specially formatted documents. The documents are formatted in a markup language called HTML (HyperText Markup Language) that supports links to other documents, as well as graphics, audio, and video files. This means you can jump from one document to another simply by clicking on hot spots. Not all Internet servers are part of the World Wide Web.
There are several applications called Web browsers that make it easy to access the World Wide Web; Two of the most popular being Firefox and Microsoft's Internet Explorer.
World Wide Web is not synonymous with the Internet.
WHOIS is an Internet service that finds information about a domain name or IP address. It can be used to check the availability of a certain domain name.
(Internet Corporation for Assigned Names and Numbers) A nonprofit organization that has assumed the responsibility for IP address space allocation, protocol parameter assignment, domain name system management and root server system management functions previously performed under U.S. Government contract.
(Moving Pictures Experts Group) Is the name of a group of standards used to code visual/audio information in a digital compressed format. It is smaller than other formats but displays the same quality.
Short for Joint Photographic Experts Group, and pronounced jay-peg. It is a image compression format. Some detail is lost when saved as JPEG.
Information, on a Web site or Web page that changes often, usually daily or each time a user reloads or returns to the page. It is also content that is structured based on user input.
Web page content that does not change with database updates, or portions of a page that are fixed in a template.
Object-Oriented Programming (OOP). A type of programming that combines data structures with functions to create reusable objects. (Java and C++)
Procedural Programming, A list of instructions telling a computer, step-by-step, what to do, usually having a linear order of execution (C, C++, Fortran, Pascal, and Basic)
The doctype declaration should be the very first thing in an HTML document, before the <html> tag.
The doctype declaration is not an HTML tag; it is an instruction to the web browser about what version of the markup language the page is written in.
Short for Extensible Markup Language, is a specification developed by the W3C. It allows designers to create their own customized tags, enabling the definition, transmission, validation, and interpretation of data between applications and between organizations.
The directory structure can be defined as a unit in which it maintains the organization of folders and/or files.
(FS, or "filesystem") 1. A system for organizing directories and files, generally in terms of how it is implemented in the disk operating system. E.g., "The Macintosh file system is just dandy as long as you don't have to interface it with any other file systems".
2. The collection of files and directories stored on a given drive (floppy drive, hard drive, disk partition, logical drive, RAM drive, etc.). E.g., "mount attaches a named file system to the file system hierarchy at the pathname location directory [...]" -- Unix manual page for "mount(8)".
Pronounced WIZ-zee-wig. Short for what you see is what you get. A WYSIWYG application is one that enables you to see on the display screen exactly what will appear when the document is printed. This differs, for example, from word processors that are incapable of displaying different fonts and graphics on the display screen even though the formatting codes have been inserted into the file. WYSIWYG is especially popular for desktop publishing. Dreamweaver is an example of this kind of software.
a set of rules for choosing the character sequence to be used for identifiers which denote variables, types, or functions
It is the process used to secure important information over the internet. The user enters his information as usual and it is then encrypted making it impossible for intruders to read. (i.e. credit card numbers, ss#)
A statement used in programing languages to execute some code accordingly to the if, then conditions.
A reference to another document or webpage.
A systematized collection of data that can be accessed immediately and manipulated by a data-processing system for a specific purpose, generally in a computer.
1. An index could serve as a home directory that catalogs a website.
2. A file called “index.html” is mainly referred to as the beginning of a website.
Authentication is the process of validating or granting access to a person based on his/her unique username and password.
Web server is a software that helps to deliver web pages. All computers can be used as a web server as long as they have the appropriate software installed and are connected to the Internet.
ISP stands for Internet Service Provider. It is a company that you pay every month in order to access to the Internet.
Web hosting is a type of Internet hosting service that allows people to make their own website accessible via the World Wide Web. It's needed to stores all your web pages and make them available online.
Registrar is an ICANN or national ccTLD accredited company who has the authority to register domain names. Registrars are competitive retailers of domain names like .info, .coop, .mobi, .name, .pro, .museums, and others.
A client-server is a structure that enables the device e.g.(blackberry, personal computer, etc.) to use their network to request and receive information over the network. The server stores files and databases to be accessed by the client. An example of this would be the use of e-mail using SMTP.
the collection of software that directs a computer's operations, controlling and scheduling the execution of other programs, and managing storage, input/output, and communication resources.
A traditional security measure specially programmed computer system that "stands" between an organization's LAN and the Internet. It prevents hackers and other unauthorized users from accessing internal networks.
Flash manipulates vector and raster graphics (mathematical points) to provide animation of text, drawings, and still images. It supports streaming of audio, video, and it can capture user input via mouse, keyboard, and microphone. Flash contains an object-oriented language called ActionScript.
refers to any of a family of freely distributable open source operating systems whose core was originally developed by Linus Torvalds based on UNIX
a popular multiuser, multitasking operating system developed at Bell Labs in the early 1970s designed to be a small, flexible system used exclusively by programmers.
A web browser is a software application that is used to display and locate web pages. Microsoft Internet Explorer and Firefox are examples.
A graphic editing software developed by Adobe. Used by photographers, designers & fine artists.
(Gnu's Not Linux) pronounced "g-noo"; a UNIX-like operating system composed of free software, where free does not refer to price but rather freedom to run, adapt, and distribute programs
(Content Management System) an application designed to store, format, reproduce and manage data; usually uses a database to store the content and a server-side scripting language to recall and display the data.
Cloudware is commonly referred to as “the cloud.” This web 2.0 innovation saves data and info on a network rather than on your local hard-drive. Examples of this would be: MobileMe by Apple, Skype and DropBox
Short for document type definition. A DTD states what tags and attributes are used to describe content in an SGML, XML or HTML document, where each tag is allowed, and which tags can appear within other tags.
Indicates the link’s destination. The href or the name attribute must be present in the <a> tag.
An absolute position element is positioned relative to the first parent element that has a position other than static.
A relative positioned element is positioned relative to its normal position.
1. The root is the starting point for a directory if folders and/or files.
2. In Unix/Linux it is also the name of the administrative user who has privileged access data within their own directory.
a set of data items consisting of a unique identifier and the data itself or a pointer to the location of the data
a single programming variable with multiple "compartments," each of which can hold a value, including an array.
a quantity that can assume any of a set of values; an abstract representation of a value
Contains a file's or application's description information.
A statement used in PHP and JAVA languages to execute some code accordingly to conditions of TRUE or FALSE.
A block of code repeated a specified number of times, or while a specified condition is true.
Programmers use a name value in order to create an open-ended data structure that allows for future updates and extensions to already existing programming code or data.
The line on the display screen where a command is expected. Generally, the command line is the line that contains the most recently displayed command prompt .
Accessibility provides alternatives to auditory and visual content, e.g. pictures, video and pre-recorded audio.
A search engine is defined as a website that outputs desired information based on the keywords or phrases a user submits. Relevant sources are then displayed in all kinds of web media.
A global network connecting millions of computers. More than 100 countries are linked into exchanges of data, news and opinions. Unlike online services, which are centrally controlled, the Internet is decentralized by design. Each Internet computer, called a host, is independent. Its operators can choose which Internet services to use and which local services to make available to the global Internet community. Remarkably, this anarchy by design works exceedingly well. There are a variety of ways to access the Internet. Most online services, such as America Online, offer access to some Internet services. It is also possible to gain access through a commercial Internet Service Provider (ISP)
(Document Object Model) A specification for a programming interface (API) from the W3C that allows programs and scripts to update the content, structure and style of HTML and XML documents.
Small text files of user information sent by web servers that are stored on your hard drive for server acess when you return to websites you already visited. Cookie files my contain login, username and purchase information.
Web page is written in HTML (hypertext markup language) which is suitable for the World Wide Web and can be translated by web browser. It can be written in scripting languages also, such as PHP, ASP, JSP, Perl and so on. It may have navigations that can link to another web page.
Home page is a starting page of a website. It usually contains navigations and the purpose of the site.
IP adddress is a code that is made up of numbers. It's an identification of each computer on the Internet. It's required to connect to the Internet. It consists of four sets of numbers from 0 t0 255, separated by three dots. For example "18.104.22.168" or "22.214.171.124".