One tap to take a photo. Two taps to pull up maps. Three taps to check notifications. Hold to dictate a message. Tap once and hold to take a video. Tap twice and hold to augment directions on the street. Tap / hold "S.O.S." in Morse code to set off a small-range EMP. Tap three times and hold to pull up most recent apps.

Please use caution when operating your glasses. Thank you.

Stories of the day:

• Google to keep Android and Chrome OS separate, says Schmidt
• Apple says there are no Google apps awaiting review in App Store
• Apple introduces two-step verification for Apple ID, iCloud accounts
• Twitter celebrates 200 million users on its 7th birthday