{TAIL ~ A software visualization technique} allows a software application or portfolio to be visually analyzed to determine {HEAD ~ the extent} and depth of problems raised when converting an existing software application or portfolio to make application or portfolio wide revisions, such as those needed to respond to the year 2000 problem or the conversion to Euro currency 
{ TAIL ~ A software visualization technique } allows a software application or portfolio to be visually analyzed to determine { HEAD ~ the extent } and depth of problems raised when converting an existing software application or portfolio to make application or portfolio wide revisions , such as those needed to respond to the year 2000 problem or the conversion to Euro currency
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