What was the original name of Microsoft Word?

The correct answer is Multi-Tool Word. Microsoft Word was originally named "Multi-Tool Word" when it was first developed by Microsoft in 1981 for the Xenix operating system. It was later renamed to "Microsoft Word" and became the dominant word processing software worldwide. Among the options:

• Word Pro: Not the original name; it is a different word processor.
• Multi-Tool Word: Correct; this was Microsoft Word's original name.
• Write Master: Incorrect; this was never a name for Microsoft Word.
• Office Scribe: Incorrect; this is not a real product name.

Hence, the correct answer is "Multi-Tool Word".