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| A-Verfahren m (противофазной записи) | |||
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| Klasse A | |||
| класс А: 33 phrases in 11 subjects |
| Astronomy | 4 |
| Automobiles | 2 |
| Cinema equipment | 5 |
| Construction | 2 |
| Electronics | 2 |
| Food industry | 3 |
| Medical | 2 |
| Photographical sound recording | 8 |
| Radio | 3 |
| Shipbuilding | 1 |
| Sound recording | 1 |