The First most common Plug-in is a Flash Player and is is perhaps the most needed plug-in. 75% of the animated
advertisements you see online are Flash .swf “movies” (Shockwave format)

The second most common plug-in need is for Adobe Acrobat Reader .pdf (Portable Document Format) viewing.
Most government forms, online application forms, and a multitude of other documents use .pdf format on the Web.


The third most common plug-in would be a movie/audio player to run .mov, .mp3, .wav, .au, and .avi files.
Windows Media Player is perhaps the most popular for this purpose, but you can use a multitude of other movie/audio
choices.

The fourth most common enhancement to get is WinZip, which allows you to download large files in “compressed”
(shrunken file size) .zip format, and then expand the compressed files for full use on your computer. This is the smartest
tool for sending either large files, or batches of many smaller files. Technically, WinZip is not a "plug-in", but it certainly is
recommended as a web browsing partner tool.

Depending on your browser habits, the likely fifth-most-common plug-in need would be for Java Virtual
Machine (JVM). The JVM allows you to run online games and online program “applets” that are written in the Java
programming language.