You need special software or hardware to view some types of multimedia files. Your computer must have a sound card and speakers or headphones if you want to listen to audio clips or videos that include audio. Animated GIF files do not require any special software or plugins, so you should be able to view those without trouble with a standard web browser such as Internet Explorer, Netscape, or Safari. Many multimedia files (including animated GIFs) are large, and may take a long time to download if you do not have a fast Internet connection.
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