| AE | Atmospheric Explorer |
|---|---|
| AI | Asphalt Institute |
| AT | Aphex Twin |
| CT | Computer Tomography (skr.) |
| CT | Cordless Telephone (skr.) |
| CT | Cordless Telephone, bezšnúrové telefóny (angl.skr.) |
| ET | Ephemeris Time (skr.) |
| PH | fot, phot (zn.) |
| PV | photovolt (zn.) |
| RT | Regal Trophy |