Hi Robert,
It can be written in this way.
If I25="AB" then"OM Can",
else if I25="AK" then "OM",
else if I25="AL" then "OM",
else if I25="AR" then "OM",
else if I25="AZ"then "FM",
else if I25="BC"then "OM Can",
else if I25="CA"then "MM"
else "not found"
you may also club conditions with same results like
If I25 in ["AB","BC"] then "OM Can",
else if I25 in["AK","AL","AR"] then "OM"
else if I25="AZ"then "FM",
else I25="CA"then "MM"
else "not found"
Thanks,
Chetan