When describing a software lincense, what does the phrase "open source" mean?

Eva has many contacts on the professional networking site she uses which contacts are considered second degree

Helen's credit card has an apr of 15.32% and a grace period of 17 days and helen pays her balance in the full every month. if her last billing cycle ended on september 26, 2009, and she made her payment on october 11, 2009, did she owe any interest on her last statement's balance?

The first screen you see when you open word2016 what is called?