Me:  edit current.c
  ...
  ...
  Me:  [Alt]-[F3] s
  Ed:  Beep
  Me:  [Alt]-[F3] S
  Ed:  Save file? y/n:
  Me:  y
  Ed:  Save file as (default = current.c):
  Me:  [Ret]
  Ed:  File current.c already exists: backup or overwrite (b/o):
  Me:  o
  Ed:  contents of old current.c will be destroyed, OK? (y/n):
  Me:  y
  Ed:  Are you sure? yes/no:
  Me:  y
  Ed:  Please reply yes/no:
  Me:  yes
  Ed:  File current.c is write-protected, enter new name:
  Me:  temp
  Ed:  Writing temp.asm to disk, 92 lines, 4312 bytes
  Ed:  FATAL ERROR 43:  write failed due to insufficient disk space.
       Exiting to DOS...

  Me:  del edit.exe           ;  me doing my good deed of the day
                              ;  and creating disk space at the same time

[Me = A.Raman@massey.ac.nz]