Some operating systems are __________; in other words, they are based on published code that can be modified and improved by anyone.

Even if your portable computer is operating and plugged in, it still is relying mainly on its battery power.

Answer the following statement true (T) or false (F)

By default, Word 2013 saves your file as a Word document with a(n) _____ extension.

A. .pdf B. .txt C. .rtf D. .docx