Title: Google Glass
Content: Touchpad: A touchpad is located on the side of Google Glass, allowing users to control the device by swiping through a timeline-like interface displayed on the screen. Sliding backward shows current events, such as weather, and sliding forward shows past events, such as phone calls, photos, circle updates, etc. ; Camera: Google Glass has the ability to take 5 MP photos and record 720p HD video. Glass Enterprise Edition 2 has an improved 8MP 80° FOV camera. ; Display: The Explorer version of Google Glass uses a liquid crystal on silicon (based on an LCoS chip from Himax), field-sequential color system, LED illuminated display. The display's LED illumination is first P-polarized and then shines through the in-coupling polarizing beam splitter (PBS) to the LCoS panel. The panel reflects the light and alters it to S-polarization at active pixel sensor sites. The in-coupling PBS then reflects the S-polarized areas of light at 45° through the out-coupling beam splitter to a collimating reflector at the other end. Finally, the out-coupling beam splitter (which is a partially reflecting mirror, not a polarizing beam splitter) reflects the collimated light another 45° and into the wearer's eye.  
Title: Google Glass
Content:  Google Glass, or simply Glass, is a brand of smart glasses—an optical head-mounted display designed in the shape of a pair of glasses. It was developed by X (previously Google X) with the mission of producing a ubiquitous computer. Google Glass displays information in a smartphone-like, hands-free format. Wearers communicate with the Internet via natural language voice commands. Google started selling a prototype of Google Glass to qualified "Glass Explorers" in the US on April 15, 2013, for a limited period for $1,500, before it became available to the public on May 15, 2014. It had an integral 5 megapixel still/720p video camera. The headset received a great deal of criticism amid concerns that its use could violate existing privacy laws. On January 15, 2015, Google announced that it would stop producing the Google Glass prototype, to be continued in 2017 tentatively. In July 2017, Google announced the Google Glass Enterprise Edition. In May 2019, Google announced the Google Glass Enterprise Edition 2.
Title: X Development
Content:  Project Glass is a research and development program by Google to develop an augmented reality head-mounted display (HMD). The intended purpose of Project Glass products would be the hands-free displaying of information currently available to most smartphone users, and allowing for interaction with the Internet via natural language voice commands. One Google Glass costs $1500.
Title: Wearable technology
Content:  On April 16, 2013, Google invited "Glass Explorers" who had pre-ordered its wearable glasses at the 2012 Google I/O conference to pick up their devices. This day marked the official launch of Google Glass, a device intended to deliver rich text and notifications via a heads-up display worn as eyeglasses. The device also had a 5 MP camera and recorded video at 720p. Its various functions were activated via voice command, such as "OK Glass". The company also launched the Google Glass companion app, MyGlass. The first third-party Google Glass App came from the New York Times, which was able to read out articles and 
Title: Google Glass
Content:  Google Glass was developed by Google X, the facility within Google devoted to technological advancements such as driverless cars. The Google Glass prototype resembled standard eyeglasses with the lens replaced by a head-up display. In mid-2011, Google engineered a prototype that weighed 8 lb; by 2013 they were lighter than the average pair of sunglasses. In April 2013, the Explorer Edition was made available to Google I/O developers in the United States for $1,500. The product was publicly announced in April 2012. Sergey Brin wore a prototype of the Glass to an April 5, 2012, Foundation Fighting Blindness event in San Francisco. 
Title: Google Glass
Content:  19, 2013, Google unveiled its Glass Development Kit, showcasing the translation tool Word Lens, the cooking program AllTheCooks, and the exercise program Strava among others as successful examples. Google announced three news programs in May 2014—TripIt, FourSquare and OpenTable—in order to entice travelers. On June 25, 2014, Google announced that notifications from Android Wear would be sent to Glass. The European University Press published the first book to be read with Google Glass on October 8, 2014, as introduced at the Frankfurt Book Fair. The book can be read as a normal paper book or—enriched with multimedia elements—with Google Glass, Kindle, on Smartphone and Pads on the platforms iOS and Android.
Title: Google Glass
Content: Android 4.4 (KitKat) ; 640×360 Himax HX7309 LCoS display ; 5-megapixel camera, capable of 720p video recording ; Wi-Fi 802.11b/g ; Bluetooth ; 16 GB storage (12 GB available) ; Texas Instruments OMAP 4430 SoC 1.2 Ghz Dual (ARMv7) ; 1 GB RAM ; 3 axis gyroscope, 3 axis accelerometer and 3 axis magnetometer (compass) ; Ambient light sensing and proximity sensor ; Bone conduction audio transducer For the developer Explorer units version 1:
Title: Google Glass
Content:  change in the future. On May 16, 2013, Google announced the release of seven new programs, including reminders from Evernote, fashion news from Elle, and news alerts from CNN. Following Google's XE7 Glass Explorer Edition update in early July 2013, evidence of a "Glass Boutique", a store that will allow synchronization to Glass of Glassware and APKs, was noted. Version XE8 made a debut for Google Glass on August 12, 2013. It brings an integrated video player with playback controls, the ability to post an update to Path, and lets users save notes to Evernote. Several other minute improvements include volume controls, improved voice recognition, and several new Google Now cards. On 
Title: Google Glass
Content: all of the features from the Explorer version 1 plus: ; 2 GB RAM ; Prescription frames available For the developer Explorer units version 2, RAM was expanded to 2 GB and prescription frames were made available:
Title: Google Glass
Content:  In early 2013, interested potential Glass users were invited to use a Twitter message, with hashtag #IfIHadGlass, to qualify as an early user of the product. The qualifiers, dubbed "Glass Explorers" and numbering 8,000 individuals, were notified in March 2013, and were later invited to pay $1,500 and visit a Google office in Los Angeles, New York or San Francisco, to pick up their unit following "fitting" and training from Google Glass guides. On May 13, 2014, Google announced a move to a "more open beta", via its Google Plus page. In February 2015, The New York Times reported that Google Glass was being redesigned by former Apple executive Tony Fadell, and that it would not be released until he deemed it to be "perfect". In July 2017, it was announced that the second iteration, the Google Glass Enterprise Edition, would be released in the US for companies such as Boeing. Google Glass Enterprise Edition has already been successfully used by Dr. Ned Sahin to help children with autism learn social skills. In May 2019, Google announced the Google Glass Enterprise Edition 2. Google also announced a partnership with Smith Optics to develop Glass-compatible safety frames.

Question: the type of display that google glass presents to its users is called what?
Answer: head-up display.
optical head-mounted display.
Prism projector.