During commercials, an overlay will appear at the bottom of the screen, prompting viewers to press a button to request a free sample or order a coupon or a catalogue.

ECONOMIST: Interactive television advertising: Shop after you drop | The

Since the Crime and Security Act became law last year, police have had powers to force thousands of past offenders across England and Wales to provide a DNA sample in order to help solve serious crimes such as murder, rape and manslaughter dating back up to 40 years.

BBC: A DNA autoradiogram

Order a sample platter so you can try everything from pale ale to organic lager.

BBC: Mini guide to Toronto, Canada

If a dealer I do not know in Cameroon sends me a monkey skull I did not order and do not want as a sample without proper permits, America will hold me responsible.

ECONOMIST: Letters

The survey researchers and statisticians associated with the government were committed to obtaining a representative sample of the U.S. population in order to provide a true reflection of the country.

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This machine shatters tiny amounts of a sample into its component atoms, ionises those atoms in order to give them an electric charge, and then uses that charge to attract the atoms along a tube.

ECONOMIST: Monitor