1.   Doing without negation is a particularly helpful feature, for a reason which will be explained below.

2.   Another helpful new feature is called Keychain.

3.   Another helpful feature is a glossary of definitions of computer terms.

4.   Another helpful feature is a taskbar icon that flashes red and green to indicate incoming and outgoing activity.

5.   A helpful feature is the source list for some of these hard-to-find ingredients.

6.   One helpful feature is voice recognition.

7.   One particularly helpful feature is the ability to find duplicate files, which tend to proliferate.