1 ANGL

  The ANGL command calculates the angles between reflections in the 
  reflection list which have their use flags set to 1. Up to 13
  reflections may be used at one time.

1 AUTO

  The AUTO command is used to determine a reduced unit cell consistent 
  with the angles of the reflections contained in the reflection list.
  On exit the reflection list is indexed to the reduced unit cell.

1 BRAV

  The BRAV command attempts to interpret the reduced cell produced
  by AUTO in terms of a conventional unit-cell. If an indexed list
  of reflections is available a least-squares fit is performed to
  obtain uncertainties in the unit-cell. 

  The result from BRAV can be sensistive to both the quality of the
  reflection data and the tolerance factor input by the user. As the
  value of the tolerance is increased, the resultant symmetry may
  be increased.

1 CALC

  The CALC command is used to calculate the diffractometer angles for
  Miller indices entered from the keyboard.

1 CALI

  The CALI command is used to calibrate diamond cell absorption.

1 CELL

  The CELL command is used to enter the lattice constants from the keyboard.

1 CENT

  The CENT command initiates a one-position centering of the reflection 
  currently in the diffractometer window. For two-position centering
  (at +/- 2theta) use REF. 

1 CLSH

  The CLSH command closes the shutter.

1 CLSQ

  The CLSQ command initiates constrained least-squares refinement of
  the lattice constants for those items in the reflection list with the
  "USE" flags set to 1.  Note: The orientation matrix is NOT updated 
  by this procedure.

1 CNTR

  The CNTR command centers the reflection starting from the current
  diffractometer position.

1 COM

  The COM command is used to determine the orientation matrix from the
  unit cell and the diffractometer angles of two reflections.

1 CONE

  The CONE command initiates a search of a cone of reciprocal space at
  a fixed angle from a particular direction.

1 DEL

  The DEL command deletes items from the reflection list by
  list number. Negative list numbers can be used to specify an inclusive
  list of reflections to delete.

1 DRIV

  The DRIV command is used to drive all motors to the positions calculated
  by the CALC command.

1 DVLS

  The DVLS command drives the diffractometer angles to those stored
  in an item of the reflection list.

1 EXIT

  The EXIT command is used to quit the SINGLE program.

1 GRID

  The GRID command samples the count intensity in the vicinity of a
  Bragg reflection and can be used to look for splitting, etc. in
  reciprocal space.

1 HALT

  The HALT command stops all currently active motor drives and scaler
  operations.

1 HELP

  The HELP command is used to get this help information.

1 INA

  The INA command is used to input reflection angles (indices not needed)
  into the reflection list. If the UB matrix is non-zero, setting angles 
  will also be written to the list. The use flag is set to 1.

1 IND

  The IND command is used to input reflection data (indices and angles)
  into the reflection list.

1 INDL

  The INDL command is used to manipulate the indices in the 
  reflection list. 

1 INDX

  The INDX command is used to calculate the "apparent" indices from angles
  input at the keyboard.

1 INH

  The INH command is used to input reflection indices into the reflection
  list. If the UB matrix is non-zero, setting angles will also be written
  to the list. The use flag is set to 1.

1 INTA

  The INTA command is used to collect a complete intensity dataset, with
  indices generated automatically under the control of parameters input
  with SETU.

1 INTL

  The INTL command is used to collect a complete intensity dataset, with
  indices taken from a list in a specified ASCII file. 

1 INTS

  The INTS command is used to collect a single intensity, hkl input from
  the keyboard.

1 LDMT

  The LDMT command is used to initialize a motor position.

1 LIST

  The LIST command types out the contents of the reflection list.

1 LSQ

  The LSQ command refines the lattice constants based on the indexing
  and angle data of entries in the reflection list which have use flags
  set to 1.

1 MOT

  The MOT command is used to drive individual motors from keyboard commands.

1 NOTE

   The note command allows comments to be typed at the console (and
   onto the printer) which will be ignored by the program. To exit
   type EXIT.

1 OM

  The OM command is used to enter an orientation matrix from the keyboard.

1 OPSH

  The OPSH command opens the shutter.

1 POWD

  The POWD command uses the diffractometer to measure a powder pattern.

1 PRNT

  The PRNT command is used to turn the printer on.  Use the "On-Line"
  switch to turn it off.

1 PROF

  The PROF command performs either an omega or theta/2theta step scan
  across the current position, and prints the reflection profile.
  
1 PSI

  The PSI command initiates a psi scan of a list of reflections.

1 REF

  The REF command performs a two position (+/- 2theta) centering of the 
  reflections in the list which have "use" flags set to 1.

1 SETU

  The SETU command is used to change the "set-up" parameters.

1 SORT

  The SORT command sorts the reflection list on the basis of ascending 
  2theta values of the reflections.

1 SRCH

  The SRCH command initiates a reflection search. 

1 TRAN

  The TRAN command is used to transform the unit cell and the indices of
  the reflection list.  A 3 x 3 matrix is used to describe the transformation.

1 USE

  The USE command is used to modify the "use" flags in the reflection
  list.

1 ZERO

  The ZERO command drives the diffractometer angles all to zero.

1 ZREF

  The ZREF command performs a Hamilton, or 8-reflection, centering of
  the reflections in the list with their "use" flags set to 1. If the
  list is indexed, the indices are used to calculate the initial position
  of the reflections, if not the angles in the list are used. 

  For restricted diffraction geometries ZREF will perform an 8 or 4
  position centering as appropriate. If only 2 positions are accessible
  the reflection is not centered.

