acorn2sfd [-version] [-help] {acorndir ...}
  
acorn2sfd will take several Acorn RISC/OS font directories and convert them into FontForge's sfd files.
  An Acorn RISC/OS font directory should contain two or three files, one named
  Outlines* and one named Intmetric? (the
  Intmetrics file may be omitted, in which case the advance widths
  will not be known). acorn2sfd will read both files and generate an
  sfd file from them (which FontForge can turn
  into TrueType or PostScript).
  
  If the Outlines file ends in a digit (Outlines0)
  then a third file named Base<digit>* will be searched
  for in the directory (if not found there then in
  <acorndir>/../Encodings), and if found encoding information
  will be read from it. If not found then the font will be assumed to be an
  initial subset of Unicode.
  
  -includestrokes acorn2sfd normally throws out the secondary
  stroked version of the character, specifying this option will include it
  in the sfd file (you may then want to invoke FontForge's Expand Stroke command
  on it).
  
  -help will provide a mini description and will list the available
  options.
  
  -usage will list the available options.
  
  -version will display the current version of acorn2sfd
  (a six digit string containing the date stamp of the source files).