It's being called the biggest miscarriage of justice in British history.
The Court of Appeals overturned 39 Convictions and is currently reviewing 22 more.
BBC said:The Horizon system, developed by the Japanese company Fujitsu, was first rolled out in 1999 to some post offices to be used for a variety of tasks including accounting and stocktaking.
But from an early stage, it appeared to have significant bugs which could cause the system to misreport, sometimes involving substantial sums of money.
Horizon-based evidence was used by the Post Office to successfully prosecute 736 people.
The Court of Appeals overturned 39 Convictions and is currently reviewing 22 more.
Convicted Post Office workers have names cleared
Judges quash convictions of 39 former postmasters after the UK's most widespread miscarriage of justice.
www.bbc.com