| PREFIX 10 | Norms and standards |
| PREFIX 11 | Teoretical projects |
| PREFIX 12 | Various Modules |
| PREFIX 121 | Various Modules |
| PREFIX 122 | Universal Microprocessor Modules |
| PREFIX 127 | UBdR - Uniwersalne Bloki dla Radiokomunikacji (Universal Blocks for Radiocommunication) |
| PREFIX 13 | Various Modules |
| PREFIX 14 | Various Modules |
| PREFIX 15 | Various Modules |
| PREFIX 16 | Adopted Modules (external construction) |
| PREFIX 17 | Adopted Modules (external construction) |
| PREFIX 18 | Adopted Modules (external construction) |
| PREFIX 19 | Power Supplies |
| PREFIX 22 | Receivers |
| PREFIX 23 | Transmitters |
| PREFIX 24 | Tranceivers and Radiostations |
| PREFIX 25 | Power Amplifiers |
| PREFIX 26 | Antenna Systems |
| PREFIX 27 | Tranverters and Converters |
| PREFIX 28 | Auxiliary Equipment for Radiocommunication |
| PREFIX 29 | Other Radiocommunication Equipment |
| PREFIX 30 | Home equipment |
| PREFIX 31 | Audio equipment |
| PREFIX 40 | Service Equipment |
| PREFIX 41 | LC filters |
| PREFIX 42 | Quartz and ceramic filters |
| PREFIX 50 | Measurment Equipment |
| PREFIX 51 | Audio Frequency Measurment Equipment |
| PREFIX 52 | High Frequency Measurment Equipment |
| PREFIX 53 | Digital Measurment Equipment |
| PREFIX 60 | Digital Systems |
| PREFIX 61 | Digital Systems |
| PREFIX 64 | Auxiliary Equipment for Digital Systems |
| PREFIX 65 | Software |
| PREFIX 66 | Software |
| PREFIX 70 | Cables |
| PREFIX 71 | Auxiliary equipment |
| PREFIX 90 | Test and experimental modules |
| PREFIX 91 | Cases |
| PREFIX 98 | Temporary assigments |
Microcontrollers in my contructions and external equipment