They control the digital spaces where many around the world spend their time, shop, work, and talk to friends and family. Together, the companies’ combined annual sales are roughly the same as the gross domestic product of Saudi Arabia, as Axios notes.Now the CEOs of four top U.S. technology companies — Apple, Amazon, Facebook and Google – are set to answer questions Wednesday in front of the House Judiciary subcommittee on antitrust about how they wield their considerable market power. Deposition for the world The hearing comes as federal and state regulators are looking into whether the tech giants, through their dominance in some …