When you install a Windows application or program, the new program spreads out with “.dll” files going to Windows’ folders, program files to its own group of folders. Not so with Mac’s OS. Typically, newly installed programs appear in a "disk image" icon. Click on the icon, and the program installs itself, often directly to the Mac Applications Folder.
To remove a program, just drag its icon from the Applications Folder to the Trash Basket on the lower right on the docking bar. Mac does not use anything similar to Windows’ uninstall feature.