U.S. Point of Sale (PoS) Market Size, Share & COVID-19 Impact Analysis, By Component (Hardware and PoS Terminal Software), By Type (Fixed PoS and Mobile PoS), By Deployment (On-Premise and Cloud-based), By Operating System (Windows/Linux, Android and iOS), By End-user (Restaurants, Retail, Entertainment, and Others), and Regional Forecasts, 2023-2030