The technological transition came just as Trump took the oath of office Friday, giving him a clean digital slate while preserving hundreds of tweets and posts made during President Barack Obama’s time in office under a new account, @POTUS44. Twitter CEO Jack Dorsey said the company made some mistakes in implementing a plan President Obama’s team had approved, which resulted in some people who say they had never followed the president’s official Twitter account or unfollowed the account in anticipation of Trump taking it over, finding themselves subscribed to the new president’s tweets. The Obama Administration worked with all their platforms to craft a transition plan. Because @POTUS is an institutional account, not personal, they felt it only fair to transition accounts with followers intact, but zero tweets. After receiving complaints, Twitter spent Friday night investigating the issue, Dorsey said, concluding that some people who followed the new @POTUS44 account were mistakenly set to follow @POTUS, and others who had unfollowed @POTUS prior to the changeover were nevertheless added to the new account. New accounts for the White House itself, Trump’s press secretary and the vice president had similar problems with followers during the transition, Dorsey said. Turning over social media accounts is a modern twist on the complex presidential transition — the 21st century version of handing over nuclear codes and the keys to the Oval Office. The National Archives preserves official social media posts in a similar fashion as paper records.