I would like to narrow down my study of philosophy to epistemology.
You can actually narrow down your search one step at a time in terms of pricing, brand, and features and save your finds for later use.
You'll need to narrow down the range of service areas by entering your zip code.
Spend time thinking about what you will need the computer for and how much you are willing to spend, and you can narrow down your choices.
If you are planning on finding out your baby's gender, this may help you narrow down your choices for baby nursery bedding.