What does the key combination ctrl+s achieve?

Lisa has a section of her document that she would like to include in the index. which option should lisa choose? mark index mark entry insert endnote add text

Jason works as an accountant in a department store. he needs to keep a daily record of all the invoices issued by the store. which file naming convention would him the most?

Aproject involves many computing systems working together on disjointed task towards a single goal what form of computing would the project be using