[Koha] marc tag for keyword, Accession number

[vijay kumar]

Dear Member,
I have to convert text file into marc tag, I would like to know the
exact marc tag equivalent for field "general keyword " so that it can
be searched by following keyword in OPAC.

I used 650$a for equivalent to keyword. But it was not showing in my OPAC.
And Second,  what should be  the best tag equivalent to accession
number in koha 3.

Thanking You,


With Regards,
vijay kumar
NCSI,IISc
Bangalore