In Northern Ireland there is a system that allows you to trace back to the farm and even when the produce was harvested, Elliott says.
Another difference: After being dogged by privacy advocates, Google now anonymizes search results -- making them difficult, if not impossible, to trace back to an individual user -- after nine months.
The authorities are now looking for anything that might have been part of the explosive devices - bits of metal or sharp objects that they might be able to trace back to its owner or owners.
If, on the other hand, you want to give money to a third party in a way that you can be sure the government will never be able to trace back to you, this technique might not work as well.
Often, when I talk to people about why they decide to make a difference, why they become a part of an organization, why did they became passionate about something, they tend to trace it back to a book or a song or a movie.
It can takes weeks or even months, if law enforcement is lucky, to trace a gun back to its origin.
It is notable, too, that Poland's new prime minister, Jerzy Buzek, is happy to trace his ancestry back to the country's small Czech minority.
Fiercely anti-immigrant, the Freedom Party (PVV), claims to trace its ideological roots back to the ideas of the Enlightenment and to defend them against culturally different newcomers.
With a quantum theory of gravity, we may be able to trace the Big Bang expansion back to its very beginning, and understand precisely how our universe arose, presumably from nothing.
It can be difficult to link all these addresses and trace them back to the origin.
The typical Viennese coffee house -- an elegant institution with high ceilings, marble-top tables and a stack of newspapers to make one linger over an impeccable black brew with a customary glass of water -- may be more famously known than its Ukrainian cousin, but to trace back the origin of the communal coffee space, you have to go to Lviv, a Medieval city in western Ukraine.
BBC: Tracing the coffee house revolution to its Ukrainian roots
Agung Rai was born to a family of farmers who can trace their history back to the 14th century.
The "arrow of time" is based on the notion that it is possible to use data from modern languages to trace their origins back 10, 000 years or even further.
WSJ: Study Points to a Single, Original Language for All Humans
The teepees used in the movies, for example, have four poles to reflect the way the Comanche built them, not three more commonly seen in movies and that trace back to Cheyenne and Sioux tribes.
"Because mutations start occurring at regular intervals in these genes as soon as a new species evolves - like the ticking of a clock - we can use them to trace the evolutionary history of a species back to its time of origin, " said Dr Hedges.
In 2008, geneticist David Craig showed that he was able to trace pooled genetic data that was available online back to an individual who had participated.
It's almost a certainty that if you're listening to this program now you're using tiny electronic devices that can trace their heritage back to the mind of William Shockley.
It makes it easier to get their pet back if it strays and easier to trace if it's stolen.
Its control of each stage of production helps Smithfield to trace back any problems with pathogens and address them.
All this production capability might still be affected by potential parts shortages that trace back to the Japanese earthquake.
Photoelectric cells and lasers, nuclear power and fiber optics, space travel, and even semiconductors all trace back to his theories.
And we see a bit of ourselves, too, because most of our stories trace back to moments just like this one.
WHITEHOUSE: President Obama Speaks at a Naturalization Ceremony
The crested blazer and modern sport jacket trace back to Princeton, as well as the emergence of white flannel trousers and buckskin shoes.
WSJ: Ivy Style | Museum at FIT | Dress Codes | By Laura Jacobs
At the place where it had been parked a police dog followed a scent trace back to a house which had just been burgled.
BBC: Night Stalker case: Delroy Grant's reign of terror ends
Her six years of legal troubles trace back to two drunken driving arrests in 2007 and include other incidents in which she was behind the wheel.
The gaps in the federal database trace back to a 1997 U.S. Supreme Court decision that struck down part of a law requiring states to report mental-health records, ruling that states could share such records as they wished.
WSJ: Systemic Gaps Hinder Background Checks for Gun Purchases
He thinks the financial services industry should create the identifier at the time of origination rather than work with closing and settlement records and then relying on data vendors such as Bloomberg or Reuters to trace back the instruments.
FORBES: Lehman, Lithium and Lettuce -- The Need for Unique Identifiers in Finance
The police marks are used to trace bottles used in crime, or found with underage drinkers, back to the stores from which they were bought.
But I think you can trace it back to the war in Kosovo, the enlargement of NATO, much of which began in the 1990s.
Trace them back to an experiment that some real researcher did.
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