What does ROM stand for?

What does RAM stand for?

What are the three main features of ROM?

What are the three main features of RAM?

If I were to save a document, and then shut down the computer, what would happen to the document?

If I were to write a document and then shut down the computer without saving it, what would happen to the document?

How could a document be deleted from ROM?

How could a document be deleted from RAM?