P.O
| multiple
| p.o. abbr. | |
| med. | orally |
| multiple abbr. | |
| gen. | multiples |
| automat. | complex |
| bot. | many |
| chem. | manifold |
| commun. | grading group |
| commun. el. | multiple switchboard |
| commun. IT | multiple console operation |
| el. | subscriber's multiple; switchboard multiple; multiple |
|
P.O : 30 phrases in 11 subjects |
| Agriculture | 1 |
| Chemistry | 7 |
| Construction | 1 |
| Earth sciences | 4 |
| Economics | 1 |
| General | 1 |
| High energy physics | 6 |
| Marketing | 1 |
| Medical | 2 |
| Telecommunications | 5 |
| Transport | 1 |