From Lunarpages Web Hosting Wiki

< Glossary


The default Web browser for the Max OS X operating system. It is noted for its fast download speed and many built-in features including the Google search bar and popup blocker


How much a system can be expanded.

Screen reader

Software for the visually impaired that reads the contents of a computer screen, converting the text to speech. Screen readers are designed for specific operating systems and generally work with most applications.


A program written in a general-purpose programming language. Such languages are typically interpreted and less comprehensive than full-blown compiled languages.

Search engine

Software that searches for data based on some criteria. Although search engines have been around for decades, they were brought to the forefront after the Web exploded onto the scene. Every Web search engine site uses a search engine that it has either developed itself or has purchased from a third party. Search engines can differ dramatically in the way they find and index the material on the Web, and the way they search the indexes from the user's query.


The protection of data, networks and computing power. The protection of data (information security) is the most important. The protection of networks is important to prevent loss of server resources as well as to protect the network from being used for illegal purposes. The protection of computing power is relevant only to expensive machines such as large supercomputers.


An SMTP-based message transfer agent (MTA) that runs under Unix. Developed at the University of California at Berkeley by Eric Allman in 1981, sendmail stores and forwards more mail than any other MTA on the Internet. In 1998, Allman commercialized the product by forming Sendmail, Inc. (, which offers a GUI interface for modifying the configuration file instead of dealing directly with more than a thousand lines of text. Sendmail, Inc. also offers a Windows NT/2000 version that includes the POP mail server and message store. Examples of mail clients developed for sendmail in the Unix world are elm, pine, mush and mailx.

SEO (search engine optimization)

Designing a Web site so that search engines easily find the pages and index them. The goal is to have your page be in the top 10 results of a search. Optimization includes the choice of words used in the text paragraphs and the placement of those words on the page, both visible and hidden inside meta tags. Search engines use different criteria for indexing, and those criteria may change. Thus, it becomes increasingly difficult to satisfy every one equally. Yahoo! and other directory-oriented search sites manually index a Web site, which may provide the best results for the user.


A computer system in a network that is shared by multiple users. Servers come in all sizes from x86-based PCs to IBM mainframes. A server may have a keyboard, monitor and mouse directly attached, or one keyboard, monitor and mouse may connect to any number of servers via a KVM switch. Servers may be also be accessed only through a network connection as well.


A Java application that allows developers to add dynamic content to their websites.


A method for maintaining state throughout a website. It is most often used to keep users logged in so that they can access features on a site.

Shared hosting

A hosting solution where multiple user's sites are hosted on the same server.


A browser plugin created by Macromedia that allows playback of multimedia files.

Shopping cart

Software on a website that allows customers to save items they wish to purchase and checkout when they have finished shopping.


Simple Machines Forum.


Short Message Service. A service that permits the exchange of text messages via mobile phones.


Simple Mail Transfer Protocol. The primary protocol used for sending email.

SOA Update

Start of Authority update.


Simple Object Access Protocol. A protocol based on XML that is frequently used in web services.


Unsolicited bulk email. Unsolicited means that the Recipient has not granted verifiable permission for the message to be sent. Bulk messages are messages that are sent massively and contain identical content.


An open source spam filter. SpamAssassin identifies spam based on the score from multiple types of checks. Spam messages are stored in a folder (usually called spam folder).


A program that surfs webpages to get the links and pass the caught links to another program to be processed. It is usually used by search engines.


Email address spoofing is an activity of illegally using other.s legitimate email address to send messages.


A program that is installed without user.s consent and running secretly on computer to collect user.s information and pass it to other parties. Spyware is installed as a result clicking on unreliable popup windows or drive-by download (automatic download without user.s consent and knowledge).


Server Side Includes are directives that are placed in HTML pages, and evaluated on the server while the pages are being served. They let you add dynamically generated content to an existing HTML page, without having to serve the entire page via a CGI program, or other dynamic technology. SSI page can be identified by .shtml file extension.


Secure Sockets Layer is a protocol developed by Netscape for transmitting private documents via the Internet.


Space in hard disk to store data such as webpages, databases and configuration files. Each user account is assigned a storage quota on the server.


To transmit data over a network. Video and Audio streaming mean to upload, download or play Video and Audio file.


Strut is another project from The Apache Software Foundation. Struts uses a special Servlet as a switchboard to route requests from Web browsers to the appropriate ServerPage. This makes Web applications much easier to design, create, and maintain.

Sub Domain

Sub domain is a domain that is part of a larger domain. In domain name, .test. is the sub domain.


suphp is a tool for executing PHP scripts with the permissions of their owners. So suphp is more secure. suphp does not allow permission 666 and 777.


SVG (Scalable Vector Graphics) is a language that delivers two-dimensional graphics in XML to the web. It provides dynamic and reusable vector graphic, text, and images.


A program that is used to create Flash animations without using Macromedia's Flash product.

Symbolic Links

Shortcuts of folders or files. Symbolic Links enable the same file to be accessed from different locations. www folder in your account is a symbolic link of public_html folder. Deleting a file in www will delete the same file in public_html.