I think the
Google Calendar link answers this best, but yes, you can sync any or all calendars with any computer or mobile device.
Each calendar can be dedicated for something different (ie: the on-call list, the staff assignment list, the vacation list, Dr. Jones' personal calendar, national holidays). When a user uses his device to log into Google Calendar, all the calendars to which that user is subscribed are displayed on a single time period (day, week or month) in different colors.
