***,H2O finite fields
R     =    0.96488518 ANG
THETA =  101.90140469
geometry={H1
          O,H1,R;
          H2,O,R,H1,THETA}
{hf;wf,10,1}           !scf without field

f=0.05

dip,,,f                !add dipole (z) field to h0
hf                     !do scf with modified h0

field,dmz,f            !add dipole (z) field to H0
                       !same result as previous example
hf                     !do scf with modified h0

quad,,,f               !add quadrupole (qmzz) field to h0
hf                     !do scf with modified h0

field,qmzz,f           !add quadrupole (qmzz) field to h0;
                       !same result as previous example
hf                     !do scf with modified h0

field,zz,f,xx,-0.5*f,yy,-0.5*f
                       !add general field; same result as quad above
hf                     !do scf with modified h0

field,zz,f           !same as before with separate field commands
field+,xx,-0.5*f
field+,yy,-0.5*f
hf                     !do scf with modified h0

field                  !remove field
hf                     !scf without field