types Plug-ins are software components that add specific capabilities to a larger soft- ware application. They are found at many different levels of Web applications. Some work directly with the browser for example, ones that allow browsers to play video, scan for malware, or add developer tools. In addition, many Web applications have plug-ins for example, the OSS application WordPress. WordPress is a blogging software application that users can download and host on a server. It has many third-party functions(i.e., written by non-WordPress employees) that can be downloaded and installed. These allow WordPress to do such things as caching, keeping statistics, adding more menus, and locking pages. Plug-ins can be written by third p because WordPress was built with specific access points and has a well-defined API that developers can use to integrate their plug-ins with the system. Figure 14-14 lists a few popular plug-ins for Wordpress blogging software out of the hundreds that are available.