====== pfmed - Procedure File Manager and Editor ======

From [[ftp://gemini.gsfc.nasa.gov/pub/fsdocs/arch.pdf|Field System Programmer Reference Manual]] (Himwich, 1993):
> The pfmed program is used to edit and manipulate the procedure file libraries. It may be started from a shell prompt. A semaphore is used to coordinate access to the procedure libraries between boss and pfmed. This allows procedures to be edited even while they are in use. All changes that a user makes in an active procedure library are saved until the operator exits from pfmed. Then the next time boss is scheduled the changes are picked-up. In order to prevent file handling problems between pfmed and boss there are two special restrictions: the Field System cannot be started or stopped while pfmed is active and operator may not change the active procedure library with either a proc= or schedule= command while pfmed is running.

===== Usage =====
  - Log on to the Field System machine assigned to the telescope where you want to edit the procedure
  - type ''pfmed''
  - Active procedure files and procedure file currently open in pfmed are given at startup
  - type ''help'' for a list of available commands. 
  - type ''exit'' when finished so that any changes are applied
  - New/changed procedures are now implemented