650 - Management and auxiliary services 65,030 Dangos Cofnodion 630 - Agriculture and related technologies 46,745 Dangos Cofnodion 610 - Medicine and health 27,487 Dangos Cofnodion 620 - Engineering and allied operations 26,096 Dangos Cofnodion 660 - Chemical engineering 10,136 Dangos Cofnodion 640 - Home and family management 3,437 Dangos Cofnodion 670 - Manufacturing 2,929 Dangos Cofnodion 680 - Manufacture of products for specific uses 1,313 Dangos Cofnodion 600 - Technology (Applied sciences) 750 Dangos Cofnodion 690 - Construction of buildings 558 Dangos Cofnodion 330 - Economics 5 Dangos Cofnodion 570 - Biology 5 Dangos Cofnodion 000 - Computer science, information, general works 3 Dangos Cofnodion 070 - Documentary, educational, news media; journalism 2 Dangos Cofnodion 150 - Psychology 2 Dangos Cofnodion 530 - Physics 2 Dangos Cofnodion 020 - Library and information sciences 1 Dangos Cofnodion 050 - General serial publications 1 Dangos Cofnodion 340 - Law 1 Dangos Cofnodion 380 - Commerce, communications, transportation 1 Dangos Cofnodion 500 - Natural sciences and mathematics 1 Dangos Cofnodion 510 - Mathematics 1 Dangos Cofnodion 550 - Earth sciences 1 Dangos Cofnodion 580 - Plants 1 Dangos Cofnodion 770 - Photography, computer art, cinematography 1 Dangos Cofnodion