| AT | Air transport (skr.) |
|---|---|
| ATA | Air Transport Association of America (skr.) |
| ATI | Aero Transporti Italiani (skr.) |
| IRU | International Road Transport Union (skr.), Medzinárodná cestná unia (angl.skr.) |
| OTE | organisation des Transports Européenns (skr.) |
| OTN | open transport network (skr.) |
| RTO | Road Transport Office (skr.) |
| RTP | Reliable Transport Protocol (skr.) |
| RTT | Reynolds transport theorem (skr.) |
| RTTT | road transport and traffic telematic (skr.) |