control field
| format
| control field | |
| commun. IT | styrfält |
| el. | kontrollfält |
| format | |
| gen. | format |
| comp., MS | formatera |
| polygr. model. | ark; arksignatur |
| work.fl. IT | formatuppgift |
| |||
| kontrollfält | |||
| styrfält | |||
| |||
| styrfält | |||
|
control field : 4 phrases in 3 subjects |
| Communications | 2 |
| Electronics | 1 |
| Information technology | 1 |