DLR can refer to different things depending on the context. Here are some possible meanings:

• Docklands Light Railway: The Docklands Light Railway is an automated light metro system primarily serving the redeveloped Docklands area of London and providing a direct connection between Londons two major financial districts, Canary Wharf and the City of London. It is a driverless train network that serves parts of east and south-east London.

• Design Layout Record: DLR can also stand for Design Layout Record, which is a term used in telecommunication circuits.

• Delivery Reporting: In the context of SMS messaging, DLR stands for Delivery Reporting. It is a feature of SMS MT that reports back on the delivery status of every SMS message that has been sent. A DLR is generated when the recipient mobile device acknowledges that it has received the message.

• Deutsche Luft-Reederei: DLR can also refer to Deutsche Luft-Reederei, which was the first German airline.

• Deutschlandradio: DLR can also refer to Deutschlandradio, a German radio network.

• DLR Group: DLR Group is a U.S. engineering and design firm.

In summary, DLR can refer to different things depending on the context, such as the Docklands Light Railway, Design Layout Record, Delivery Reporting, Deutsche Luft-Reederei, Deutschlandradio, or DLR Group.