To gain entry and traverse interior doors, you must flash a smartcard and punch in a numeric code.

CNN: Virus protection coming for wireless users

Users can punch in a code when registering and get a discounted price.

FORBES

With the pointer that he keeps attached to his hand, Ward can punch in a security code and the automatic door swings open.

NPR: 'Future Home' Adds Ease to Living for Everyone

You can visit the site or call 1-800-CLEANUP, punch in a ZIP code and get a list of nearby collection sites for a wide range of hazardous materials.

CNN: Be your own hazmat squad

Urban suggests going to the National Association of Health Underwriters Web site, where people searching for health insurance can punch in a zip code to get a short list of local and licensed brokers.

NPR: The Hunt For Affordable Health Insurance

Collaboration with Microsoft resulted in a feature that lets Focus owners punch in their zip code and see if their local utility offers lower rates for electricity use when demand is low.

FORBES: Ford's Electric Car Strategy Comes Into Focus

When users are in a store considering whether to purchase an item, they can punch in its bar code number on their phones.

ECONOMIST: America rides the wireless wave

Just punch in your zip code and see a nearby drop-off location.

FORBES: Making Recycling Electronics as Easy as Buying Them

What started as somewhat clunky keypads that required vehicle operators to punch in five digit codes to get a vehicle to start, a code given to them when their car payment was made, has moved to more sophisticated remote technology.

FORBES: Bad Password Management Will Stop You in Your Tracks