The executive order includes several measures specifically targeting big tech companies like Google, Facebook, Apple and Amazon, people with knowledge of its contents said. The order will tell the federal agencies that approve mergers that they should scrutinize the tech industry’s practices more closely. A second provision will encourage the Federal Trade Commission to write rules limiting how the tech giants use consumer data, a response to criticism that companies like Amazon can leverage what they know about users to gain the upper hand on competing services and businesses... Mr. Biden has already put some vocal critics of Big Tech in leadership positions. In the White House, he appointed Tim Wu, a Columbia University law professor and outspoken proponent of breaking up companies like Facebook, as a special adviser on competition. He named Lina Khan as chair of the Federal Trade Commission. Ms. Khan has also called for the breakup of big tech companies and worked on a House antitrust investigation into Amazon, Apple, Facebook and Google.