In Windows, a folder inside another folder on your hard drive (or on some other storage medium, such as a diskette or a CD-ROM) in which disk files are stored. A subfolder is designated by a backslash symbol (\) followed by the subfolder's name. Usually, this designation is appended to the name of the subfolder's "parent" folder. If you installed Diet Power 4.4 for All Users in Windows XP, for example, the subfolder in which your personal diet records are stored would be designated \Documents and Settings\All Users\Application Data\Linda110655 if your name is Linda and you were born on 11/6/55. (In DOS and Windows 3.1, subfolders were called "subdirectories." Some people use the terms interchangeably.)