Newbie question about apps

view story

http://forum.xda-developers.com – I saw many apps inside swipe down from top>click gear icon>click more tab>click application manager>downloaded. 1 How do I see which apps are from android, which apps are from samsung, which apps are from my cellphone provider? 2 In gear icon>more tab>application manager>running, how do I know which apps are started to run by the phone and which apps are run by me? Did I forgot to stop running some apps or should these apps be running at all times? For example I see over 20 app under running such as Maps, Samsung WatchOn, Weather Widget, McAfee Security, Filter. Se (HowTos)