contact update

Is there a way to update the email address and company name for multiple contacts or do they need to be updated one at a time?

For example, I keep a spreadsheet with similar data below.

Jane Doe is currently with Doe Realty; [email protected] and is now with JDOE Realty; [email protected] 

John Doe is currently with ABC Realty; [email protected] and is now with Doe Realty; [email protected]

And so on.  Any way to edit other than one at a time?