Scientists have developed a computer program that allows laptops to shout for help if they have been stolen.
The program, called Retriever, has been developed by a software company called Front Door Software Corporation, reports the Telegraph.
Retriever enables users to display alerts on the missing computer''s screen and even to set a spoken message such as a shout or a warning.
Tracking software for stolen laptops has been on the market for some time, but this is understood to be the first that allows owners to activate recorded messages, according to The Times.
Owners must report their laptop missing by logging on to a website, which sends a message to the computer, triggering on-screen messages of warning to the thief and voice alerts.
The 21-pound software, designed by the Colorado-based firm, also collects information if the stolen laptop is being used to access the Internet so that the police can be alerted to its location.