Changes to DST rules cause problems in existing computer installations. For example, the 2007 change to DST rules in North America required many computer systems to be upgraded, with the greatest impact on email and calendaring programs; the upgrades consumed a significant effort by corporate information technologists. COUNT 5
QSN1 What can cause issues with installed computer systems? ANS1 Changes to DST rules QSN2 What year did DST rules change in North America? ANS2 2007 QSN3 What did many existing computer systems that relied on time zones need because of the DST rule changes? ANS3 upgrades QSN4 In addition to calendaring programs, what kind of programs were most impacted by the changes? ANS4 email QSN5 Which professionals bore the brunt of the effort to upgrade systems affected by time changes? ANS5 corporate information technologists