The average computer is packed with hidden software that can secretly spy on online habits, a study has found.

The French say arobase; the Dutch call it a monkey’s tail; and in Japan it is atto maaku.

On a qwerty keyboard, it’s shift-2. And next month, amateur radio enthusiasts will call it dit-dah-dah-dit-dah-dit. That is when the symbol @ officially becomes the newest character in the Morse code.

A new type of Blu-Ray digital video disk made largely from paper has been developed by Sony and Toppan Printing in Japan. The two companies say such paper-based disks will be cheaper to make and less environmentally harmful.