Researchers at Lab 42 asked 500 LinkedIn users that question and many more, and came up with a variety of answers in this infographic. Among the fun facts they uncovered: We found it interesting the way top level executives use the service in vastly different ways from entry-level workers.
BCE stands for  Before the common era . BC means  Before Christ,  or  Before the Messiah.  Both measure the number of years before the approximate birthday of Yeshua/Jesus. Designation of a year in BC and BCE also have identical values. Many people assume that Yeshua/Jesus was born at the end of 1 BCE.
The abbreviation cf. stands for the Latin word confer which means âcompare.â It is primarily used in endnotes or footnotes to point the reader to works that offer an argument which contradicts or is otherwise different from the authorâs argument.he abbreviation i.e. stands for id est, which translates literally as âthat is.â Sometimes it might be more useful, however, to translate it as âwhat that means isâ or âthat is to say.â This abbreviation is used to clarify the preceding idea by restating it more simply or in different terms.