The Free On-line Dictionary of Computing (30 December 2018):

FDISK

    (Fixed disk utility) An MS-DOS
   utility program which prepares a hard disk so that it can be
   used as a boot disk and file systems can be created on it.
   OS/2, NT, Windows 95, Linux, and other Unix versions
   all have this command or something similar.

   (1996-12-23)