| Subject | English | German |
| IT | class A amplification | A-Verstärkung |
| tech. | Class A amplifier | A-Verstaerker |
| econ., amer. | class A deductions | Werbungskosten (als Steuerfreibetrag) |
| transp. | class A division | Trennfläche vom Typ A |
| amer. | Class A fire rated roof covering | harte Bedachung nach DIN 4102-7 |
| comp., MS | Class A IP address | IP-Adresse der Klasse A (A unicast IP address that ranges from 1.0.0.1 through 127.255.255.254. The first octet indicates the network, and the last three octets indicate the host on the network. Class-based IP addressing has been superceded by Classless Interdomain Routing (CIDR)) |
| tech. | class A message | Meldung Klasse A (COM) |
| commun. | class A modulation | Klasse A-Modulation |
| el. | class A operation | A-Betrieb |
| tech. | class A traffic | Verkehr Klasse A (COM) |
| transp., avia. | performance class A aeroplane | Flugzeug der Flugleistungsklasse A |