Heading
A paragraph type that is displayed in a large, bold typeface. The size of a heading is related to its level: Heading 1 is the largest, Heading 2, the next largest, and so on. Use headings to name pages and parts of pages.

Hidden field
A form field that is invisible to the user but that supplies data to the form handler. Each hidden field is implemented as a name-value pair. When the form is submitted by the user, its hidden fields are passed to the form-handler along with name-value pairs for each visible form field.

Home page
The starting point on a Web server. It is the page that is retrieved and displayed by default when a user visits the Web server. The default home-page name for a server depends on the server's configuration. On most Web servers, it is index.html or index.htm. Some servers support multiple home pages.

Horizontal line
A horizontal graphic element on a World Wide Web page often used to separate sections of the page.

Host
See server.

Host name
See network location.

Hotspot
A graphically defined area in an image that contains a hyperlink. An image with hotspots is called an image map. In browsers, hotspots are invisible. Users can tell that a hotspot is present by the changing appearance of the pointer.

HTIMAGE.EXE
The CERN image map dispatcher. This program handles server-side image maps when the image map style is "CERN."

HTML (HyperText Markup Language)
The standard language for describing the contents and structure of pages on the World Wide Web.

HTML attribute
A name-value pair used within an HTML tag to assign additional properties to the object being defined.

HTML character encoding
A table that associates a numeric index with each character in a character set. The table is used when you create a Web page for use in a specific language.

HTML tag
A symbol used in HTML to identify a page element's type, format, and structure.

HTTP (HyperText Transport Protocol)
The Internet protocol that allows World Wide Web browsers to retrieve information from servers.

Hyperlink
A jump from text or from an image map to a page or other type of file on the World Wide Web. In World Wide Web pages, hyperlinks are the primary way to navigate between pages and among Websites.

Hypertext
Originally, any textual information on a computer containing jumps to other information. The hypertext jumps are called hyperlinks. In World Wide Web pages, hypertext is the primary way to navigate between pages and among Websites. Hypertext on World Wide Web pages has been expanded to include hyperlinks from text and hyperlinks from image maps.

IIS (Internet Information Server)
Microsoft's high-performance, secure, and extensible Internet server based on Windows NT Server. IIS supports the World Wide Web, FTP, and gopher.

Image
A graphic in GIF or JPEG file format that can be inserted in a World Wide Web page. FrontPage lets you import images in the following formats and insert them as GIF or JPEG: GIF, JPEG, BMP (Windows and OS/2), TIFF, TAG, PCD, RAS, EPS, PCX, and WMF.

Image alignment
The specification of how images and text are aligned with each other on the page.

Image form field
A form field that displays an image in a form. By clicking the image, the user either submits or clears the form.

Image map
An image containing one or more invisible regions, called hotspots, which are assigned hyperlinks. Typically, an image map gives users visual cues about the information made available by clicking on each part of the image. For example, a geographical map could be made into an image map by assigning hotspots to each region of interest on the map.

IMAGEMAP.EXE
The NCSA image map dispatcher. This program handles server-side image maps when the image map style is "NCSA."

Inline image
An image that is embedded in a line of text rather than in its own window.

Interlaced image
A GIF image that is displayed full-sized at low resolution while it is being loaded, and at increasingly higher resolutions until it is fully loaded and has a normal appearance.

Internal hyperlink
A hyperlink to any file that is inside the web page.

Internal web
A World Wide Website created within an organization and accessible only to members of that organization on an intranet.

Internet
The global computer network, composed of thousands of Wide Area Networks (WANs) and Local Area Networks (LANs), that uses TCPIP to provide world-wide communications to homes, schools, businesses, and governments. The World Wide Web runs on the Internet.

Internet address
See network location.

Internet database connector
A Microsoft IIS feature that allows your World Wide Website to access databases.

Intranet
An intranet is a private network that uses the same software as the Internet, but restricts access to people within a company or organization.

IP (Internet Protocol)
Internet software that divides data into packets for transmission over the Internet. Computers must run IP to communicate across the Internet. See also TCP.

IP address (Internet Protocol address)
The standard way of identifying a computer that is connected to the Internet, much the way a telephone number identifies a telephone on a telephone network. The IP address is four numbers separated by periods, and each number is less than 256, for example, 192.200.44.69. Your system administrator or Internet service provider will assign your machine an IP address.

IP address mask (Internet Protocol address mask)
A range of IP addresses defined so that only machines with IP addresses within the range are allowed access to an Internet service. To mask a portion of the IP address, replace it with the asterisk wild card character (*). For example, 192.44.*.* represents every computer on the Internet with an IP address beginning with 192.44.

ISAPI (Internet Server Application Programming Interface)
A high-performance Web server application development interface, developed by Process Software and Microsoft Corporation, which can be used in place of CGI.

ISP (Internet Service Provider)
An ISP is a company that provides Internet access to other companies and individuals. An ISP typically has a network of servers for email, newsgroups, and Web access. These are all connected to the Internet via a dedicated high-speed connection.

Java
Java is a programming language developed by Sun Microsystems that adds animation and other actions to Web sites. The small applications (called applets) that Java creates can play back on any Web browser that is Java-capable.

JavaScript
Designed by Sun Microsystems and Netscape, JavaScript can be added to standard HTML pages to create interactive documents. JavaScript has become quite popular and can be found in many interactive Web-based forms. Most browsers contain JavaScript support.

JPEG (Joint Photographic Expert Group)
JPEG is another type of graphics file frequently found on the Internet. JPEG files can be compressed even smaller than GIF files and can include up to 16 million colors. This makes JPEG an excellent format for medium to large pictures and graphics. However, JPEG files lose some image quality with compression.

Kilobyte
A kilobyte (K) contains 1,024 bytes (that's 2 to the 10th power).

LAN (Local Area Network)
A computer network technology that is designed to connect computers that are separated by a short distance. A LAN can be connected to the Internet and can also be configured as an intranet.

Line break
A special character that forces a new line on the page without creating a new paragraph.

Link
See hyperlink.

Linux
Linux is an operating system derived from UNIX. Linux is one of the most popular operating systems for Internet servers, primarily due to its efficient design and its low price (in fact, it can be downloaded from the Internet for free). Additionally, the code behind Linux is open to the public, allowing any programmer to revise and improve upon its features.

List
A group of paragraphs formatted to indicate membership in a set or in a sequence of steps.