The unibody model debuted in October 2008 in 13- and 15-inch variants, with a 17-inch variant added in January 2009. Called the "unibody" model because its case was machined from a single piece of aluminum
Lighting
A major reduction in the cost of lighting occurred with the discovery of whale oil. The use of whale oil declined after Abraham Gesner, a Canadian geologist, first refined kerosene in the 1840s, allowing brighter light to be produced at substantially lower cost.
Active filters
- Color: Camel
The switches used in Logitech Silent Mice are made of a rubber actuator that dampens both the vibration and the sound. A red plastic cap covers the rubber actuator to improve the switch's tactile feedback and lengthen its lifespan.
Apple's made clear its interest in augmented reality, and we may hear more about its plans to make AR Glasses in 2023. The rumors suggest that we could see Apple's AR or VR headset product in 2023. Apple's upcoming xrOS may even be the start of a whole new ecosystem of devices.