How i imagine pda in our game (after you press tab, shit like this would appear. You have a pc like taskbar, you could then open windows showing important things like workforce status, balance, job related tasks, weapons you have equipped so you can check what they can do, your health status, order menu where you order things like meat and other foods you need to replenish to have something to sell, map of location, radar, web when you can browse for informations and potential advertisements so you can earn money passively by allowing people to show their ads on screens or on your screen or to look out for events like current police status, ice raids, gang wars, shooters and so. And finally, hire and appliance window where you can send requests for new employees and to order new machines)