| Subject | English | Polish |
| radio | class A of an amplifying stage | klasa A wzmacniacza |
| comp., MS | Class A IP address | adres IP klasy 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 Class-based IP addressing has been superceded by Classless Interdomain Routing (CIDR)) |
| vac.tub. | class A operation | praca w klasie A |
| account. | class A preference share | akcja uprzywilejowana klasy A |
| transp., avia. | performance class A aeroplane | samoloty o klasie osiągów A |