For example, in the US (which began passing laws tolerating dual citizenship in the 1950s), the numbers show that Latin American immigrants who become dual citizens have greater employment gains and lower welfare use than those who become US citizens but let go of their first citizenship, indicating economic assimilation.

BBC: The equation of dual citizenship

At a downtown Chicago McDonald's that doesn't yet have the screens to display order numbers, but is starting to implement dual-point ordering by calling out the number on the receipts, service was fast and friendly on a recent day.

WSJ: McDonald's Tackles Repair of 'Broken' Service

The Samsung GALAXY S DUOS combines high-end performance with total communication flexibility owing to its Dual SIM functionality, which allows users to manage two phone numbers from a single phone.

ENGADGET: Samsung Galaxy S Duos goes official: launches in Europe next month