• Adobe Acrobat Reader - This is a program available free from Adobe Co. It must be installed on your computer in order for you to view files that have been created in .pdf format. It is very useful and should be on every computer. 
  • dpi - Dots per inch. Monitors are only capable of displaying 72 dots per inch. Most printers are capable of printing images in 300 or 600 dpi or more. 
  • .gif - Graphic Interchange Format (.gif) supports 256 colors and can be made transparent and/or animated. Given two images of equal dimensions, a .gif file consists of fewer kilobytes and will download faster than a .jpg. However, since it supports only a low number of color, .gif format is generally used primarily for line drawings and buttons.
  • .html - Hypertext Markup Language (.html) is the computer language (code) used by web pages. It may be viewed on a wide range of computer types around the world.
  • .jpg - Joint Photographic Group (.jpg) format is a file compression scheme used for Web graphics. Unlike .gif, the .jpg format supports up to 16 million colors which makes it a superior method of presenting color photographs. Also .jpg files cannot be animated or made transparent.
  • lossless - Does NOT loose any image information when the file is saved. A lossless format (such as .tif, .bmp or .psd) does not compress the file each time it is saved. Since no information is taken out, the files remain large but the image quality remains high.
  • lossy - Loses image information every time image is saved. This happens because these formats (such as .jpg or.gif) compress the file each time it is saved. It makes for a smaller file size but some of the information squeezed out also results in a lower quality image.
  • MSWord - Microsoft Word is a word processing program which saves files with a .doc extension. For submitting information for your website, it is easy to send files as an email attachment created in MSWord format. You can also choose to Save As a .rtf (see below) file which may be opened by most common word processing programs. 
  • .pdf - Portable Document Format (.pdf) is the Adobe Acrobat Format for saving documents for use on the Web. You can take a document created in a desktop publishing programs such as Adobe PageMaker and save it as a .pdf file which will preserve all the formating and "look" of the document. This may be posted on the website and visitors will view it with Adobe Acrobat Reader on their own computers.
  • resolution - How many pixels (ppi) or dots (dpi) per inch are in an image. Higher the resolution the better quality the image but also the larger the file. Images to be used on the Web need only be at a resolution of 72 dpi since that is all that monitors will show. Images that will be printed, will provide better quality when created at 300 or 600 dpi but the file sizes will be very large.
  • .rtf - Rich Text Format (.rtf) is a file format that lets you exchange text files between different word processors in different operating systems. For example, you can create a file using Microsoft Word and save it as an .rtf file (it will have a ".rtf" file name suffix).
  • .tif or .tiff - Tag Image File Format (.tif or .tiff) is a lossless image format with a capacity for millions of colors. Primarily used for print. Not suitable for the web because of the very large file size.