What is the difference between HBO and HBO Now?

HBO is a premium pay TV service accessible via a Digital, HD or DVR converter box, Media Player or Cable Card.  This service includes both live content, a variety of multiplex channels, HBO On Demand (not available with Cable Card), and HBO GO at no additional cost with your HBO subscription.  HBO GO includes access to HBO content from your computer, mobile devices, streaming players, game consoles and connected TVs.  HBO NOW includes the same content as HBO GO, but is a standalone streaming service purchased separately, and supported on computer browsers, iOS devices, and Apple TV only and available to customers without a SECV TV Subscription.