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A keyboard protector is placed on top of a keyboard, acting as a physical barrier to the environment. When a key is depressed, the protector material deforms with the key, allowing full key travel and tactile feedback. Some models of have the sides of the protector extend to the underside of the keyboard, which are secured with adhesive tape.
Apple Inc. has designed and developed many external keyboard models for use with families of Apple computers, such as the Apple II, Mac, and iPad.The Magic Keyboard and Magic Keyboard with Numeric Keypad designed to be used via either Bluetooth and USB connectivity, and have integrated rechargeable batteries; The Smart Keyboard and Magic Keyboard accessories for iPads are designed to be ...
If connected to a computer using a USB to Lightning cable, it functions as a wired keyboard, not needing the Bluetooth connection. It used an ST Microelectronics STM32F103VB 72 MHz 32-bit RISC ARM Cortex-M3 processor and included the Broadcom BCM20733 Enhanced Data Rate Bluetooth 3.0 Single-Chip Solution.
Steve Jobs introduced the MacBook Air during Apple’s keynote address at the 2008 Macworld conference on January 15, 2008. [4] The first MacBook Air was a 13.3-inch model, initially promoted as the world's thinnest notebook at 1.9 cm (0.75 in) (a previous record holder, 2005's Toshiba Portege R200, was 1.98 cm (0.78 in) high).
On the same date, the 13-inch M2 MacBook Air received a price cut from $1199 to $1099. [22] On March 4, 2024, Apple announced a refreshed M3 MacBook Air in both 13-inch and 15-inch sizes. This model retains the same design as the M2 MacBook Air, but adds support for two external displays when the lid is closed.
[2] [75] Apple released an entry-level version of the 13-inch MacBook Pro on October 27, 2016, which was specifically targeted towards MacBook Air users. [76] A Retina MacBook Air was released in late 2018. The 11.6-inch MacBook Air, introduced in October 2010, is only slightly larger and heavier (when closed) than the iPad 2. The 11.6-inch Air ...
The Apple Extended Keyboard (AEK, model M0115) is a computer keyboard that was first sold separately alongside the Macintosh II and SE starting in 1987. It was replaced in 1990 by the Apple Extended Keyboard II ( AEKII , model M3501) which was pre-packaged with Apple Professional Desktops starting with the Macintosh IIsi .
An idempotent e: A → A is said to split if there is an object B and morphisms f: A → B, g : B → A such that e = g f and 1 B = f g. The Karoubi envelope of C , sometimes written Split(C) , is the category whose objects are pairs of the form ( A , e ) where A is an object of C and e : A → A {\displaystyle e:A\rightarrow A} is an ...