4DOS 5.5 patch file, updates 4DOS 5.5
  rev B to 4DOS 5.5 rev C.  ONLY USEFUL if
  you already have 4DOS 5.5 rev B, not
  needed by new users.  To check your
  current 4DOS version use VER /R.  Also
  requires patch program (see 4DPATCH.ZIP).

  4DOS/NT 2.5 patch file, updates 4DOS/NT 2.5
  rev B to 4DOS/NT 2.5 rev C.  ONLY USEFUL if
  you already have 4DOS/NT 2.5 rev B, not
  needed by new users.  To check your
  current 4DOS/NT version use VER /R.  Also
  requires patch program (see 4DPATCH.ZIP).

  4OS2/32 2.5 patch file, updates 4OS2/32 2.5
  rev B to 4OS2/32 2.5 rev C.  ONLY USEFUL if
  you already have 4OS2/32 2.5 rev B, not
  needed by new users.  To check your
  current 4OS2/32 version use VER /R.  Also
  requires patch program (see 4DPATCH.ZIP).

  TAME Release 3.3
  Speeds multitasking of DOS 
  applications in Windows, OS/2, 
  DESQview, Windows NT, 
  Double DOS and many more.

  TSX-Lite v4.20 - 32-bit, multi-user operating
  system. Part 1 of 4. Download first and read
  documentation before downloading rest of
  system. TSX-Lite is a full, 32-bit,
  multi-user O.S. that is DOS compatible and
  supports 2 users with up to 10 tasks each,
  background batch jobs, DPMI, virtual memory.
  Cohabits peacefully with DOS. Shareware
  product. The system itself is in TSX420B.ZIP,
  TSX420C.ZIP, and TSX420D.ZIP.

  TSX-Lite v4.20 - 32-bit, multi-user operating
  system. Part 2 of 4. Download TSX420A.ZIP
  with doc files first. TSX-Lite is a full,
  32-bit, multi-user O.S. that is DOS
  compatible and supports 2 users with up to 10
  tasks each, background batch jobs, DPMI,
  virtual memory. Cohabits peacefully with DOS.
  Shareware product. Full set has four files:
  TSX420A.ZIP, TSX420B.ZIP, TSX420C.ZIP,
  TSX420D.ZIP.

  TSX-Lite v4.20 - 32-bit, multi-user operating
  system. Part 3 of 4. Download TSX420A.ZIP
  with doc files first. TSX-Lite is a full,
  32-bit, multi-user O.S. that is DOS
  compatible and supports 2 users with up to 10
  tasks each, background batch jobs, DPMI,
  virtual memory. Cohabits peacefully with DOS.
  Shareware product. Full set has four files:
  TSX420A.ZIP, TSX420B.ZIP, TSX420C.ZIP,
  TSX420D.ZIP.