Apple Keyboard

Layout1986, it was an extended keyboard that had a
The Command keybuilt-in numeric keypad. In 1987 it was updated to
The Option keyApple's new Platinum gray color. It continued to
The modifier keysuse the telephone-cord style connector to the
To serve the functionality of the Mac OS (andCPU and was interchangeable with the M0110.
because of historical differences), the AppleThough Apple switched all other keyboards to
Keyboard's layout differs somewhat from that ofApple Desktop Bus connectors by this time, this
the more ubiquitous IBM PC keyboard, mainly inkeyboard was manufactured unchanged for 4
its modifier and special keys. Features differentmore years until the Plus was discontinued in 1991.
from other keyboards include:Apple Desktop Bus Keyboard (A9M0330)
The Command key (), used in most MacApple Desktop Bus Keyboard.
keyboard shortcuts. The key functions as theThis was the first Apple keyboard to use the
Windows key in Windows environments, or anew input connection method the Apple Desktop
Meta key in Unix-like environments. In commonBus (ADB), first released and sold with the Apple
applications, such as word processors, it is theIIGS. Designed to be used with both the
equivalent to the Windows Control key. ComparedMacintosh and Apple product lines it was the first
to their equivalents of the standard IBM PCto combine both the Macintosh Command Key
keyboard layout the Command key and theand Apple "open" Apple key. Entirely Platinum gray
Option key are located in reverse order.in color (the Macintosh Plus has darker gray keys
The "open" (hollow) & separate "closed"called "Smoke"), it was also the first to use Snow
(solid) Apple logo keys () on the Apple II series,White design language that was similar to the
served functions similar to that of the CommandApple IIc. However, it duplicated the extended
key. The open-Apple key was combined with thedesign established by the Plus. It was also the first
Command key on Apple Desktop Bus keyboardsto include an external power/reset button and an
(which were used on both the Apple IIgs andextra ADB port.
several years of Macintosh models) where itApple Keyboard (M0116)
remained after the Apple II line was discontinued.Apple (Standard) Keyboard
The Option key (), for entering diacritics and otherAlso known as the Apple Standard Keyboard, it
special characters. Like the Shift and Control keys,was the first to officially use this name. Apple
the Option key serves as a modifier for thewould later reuse the name for a series of
Command key shortcuts, as well as being used tosuccessive keyboards. The Apple Keyboard was
type many special characters. It serves thea more solid version of the Apple Desktop Bus
function of the solid-Apple key in Apple IIKeyboard and optionally included with the
applications. It functions as the Alt key in Unix andMacintosh II and SE in 1987. The heftier design
Windows environments. Compared to theirsolidified visually the power performance
equivalents of the standard IBM PC keyboardembodied by the upgraded Macs. Aside from
layout the Command key and the Option key areweight the main difference was the significantly
located in reverse order.thicker frame width. It was the first keyboard to
Full-sized desktop keyboards with a dedicatedbe sold separately from the CPU, giving the
numpad have function keys that can range up tocustomer a choice of the basic or advanced
F15, F16, or F19. F17-F19 keys were introducedkeyboards offered by Apple.
with the aluminium USB keyboard. CompactApple Extended Keyboard (M0115)
keyboards such as the bluetooth wirelessMain article: Apple Extended Keyboard
aluminium keyboard and the built-in keyboards onApple's advanced keyboard, the first to be sold
all Intel-based notebook PCs range from F1-F12optionally, was essentially a redesigned version of
only, just like IBM PC keyboards.the Apple Keyboard, with an enhanced extended
A Clear key, instead of a Num Lock key, onkeyboard with FKeys and other PC-style keys. It
models with full numeric keypads, as these areincluded template guides above the top row of
dedicated to numerals and not generally used forfunction keys to accommodate shortcut key
cursor control.references which accommodate many software
An "equals" key (=) added to the numeric keypad.packages. It was the heaviest of all the Macintosh
A Help key, instead of an Insert key, or on thekeyboards and set the standard for many typists.
most recent aluminum keyboards, a fn key, whichIt was sold separately from any Apple CPU and
toggles the function of the function keys betweenretailed for US$163.
their default functions and special functionsApple Keyboard II (M0487)
(volume control, expos, etc).Apple Keyboard II
Two delete keys: Mac keyboards typically labelIntroduced and sold with the Macintosh Classic and
the backward delete key as "delete," whereas theLC in 1990, this keyboard was almost identical to
forward delete key has the label "del" and thethe original ADB Keyboard, but included flip down
forward delete symbol () to differentiate it fromfeet to change the typing angle and a design
the backward delete key.change that gave the frame and keys a more
Notebook computers typically include additionalstreamlined appearance. Internally, the M0487
assignments shared with function keys reducediffered from the original M0116, as the M0487 did
and increase brightness, volume up, volume down,not use mechanical keyswitches. In 1993, The
mute, and eject (). Apple, since the release of theMacintosh TV was the first Mac introduced in all
Pro Keyboard, provides these last four keys onblack. It came with an identical black Keyboard II
desktop keyboards above the numeric keypad(using the same model number). This keyboard
where status indicator lights are on many IBM PCmarked the return of Apple including a standard
keyboards. On the newest aluminium keyboard,keyboard together with the CPU.
these functions are accessed with the functionApple Extended Keyboard II
keys, just like on the Apple laptops.Main article: Apple Extended Keyboard
On Apple Desktop Bus keyboards, a power keyA minor update to the Apple Extended Keyboard
(), used to turn on computers that supported itto coincide with the release of the Macintosh IIsi
(and to type the Mac three-finger salute). It wasin 1990, it added an adjustable height feature.
placed in the upper left or upper right (in line with(M0312) was manufactured with the classic Alps
the function keys on keyboards that had them,mechanisms
otherwise above the other keys). The key was(M3501) was manufactured with Mitsumi or Alps
replaced with a more conventional power buttonmechanisms.
on early USB keyboards, thanks to a proprietaryApple Adjustable Keyboard (M1242)
pin wired to the Macintosh's power supply inApple Adjustable Keyboard
Apple's early USB implementations, subsequentlyMain article: Apple Adjustable Keyboard
eliminated on the Pro Keyboard along with theThe Apple Apple Adjustable Keyboard, sold
special power supply pin. Most of its functionsoptionally, was Apple's foray into the ergonomic
were transferred to the eject () key in such lateradjustable keyboard market in 1993. Often cited
keyboards (holding down the control keyfor its flimsy construction. It came with a
simultaneously to make the eject key act like theseparate keypad (not sold separately), the first to
power key).do so since the original Macintosh keyboard.
There is a difference between the return () andNewton Keyboard (X0044)
the enter () keys. They generate differentIn the mid-90's Apple released the Apple Newton
keycodes and have different functions accordingsub-mini keyboard to allow quick input by a means
to Macintosh User Interface Guidelines.other than hand-recognition which required
Similarly, although most software ignores it, theextensive training to become useful. It connected
left versus right sets of modifier keys and theby means of the Newtons serial interface. Many
top number versus numeric keypad produceMac users favoring the portable size were able to
distinct keycodes (even on laptop keyboardsuse it on a Mac utilizing a third party enabler. In a
where they only exist using the function key).foreshadowing of the iPhone to come, the
HistoryNewton also included a virtual keyboard.
Six keys from a 2003 PowerBook G4 keyboard.Apple Design Keyboard (M2980)
The Macintosh keyboards are somewhatThe black Apple Design Keyboard.
reminiscent of the keyboards used for the AppleThis was the first major redesign of the Apple
II.keyboard, featuring more fluid, curving lines to
Starting in 1977, the first Apple keyboards werematch the look of the new Apple product style. It
built into the cases of the Apple II series and thewas an unpopular replacement for the Apple
later Apple III series systems. These firstExtended Keyboard II in 1994. Significantly lighter
keyboards had chocolate brown keycaps withthan its predecessors, it had a much softer and
white legends and had about 52 keys. In 1983,quieter key interface that was unpopular with
Apple introduced its first separate keyboard withmany typists. Also, it only included one additional
the Lisa; it incorporated a numeric keypad andADB port concealed on the underside, two of
lighter taupe-colored keycaps with black legends.which on either end had become a standard
It connected via a unique TRS port. Thefeature on the Apple keyboards. This keyboard
Macintosh updated the look somewhat andwas also produced in black using the same model
separated the numerical keypad from thenumber (like the Apple Keyboard II before it),
alphanumeric unit, all of which connected byspecifically for inclusion with the black Performa
telephone-style modular cables. By 1986, the5420 released primarily in Europe.
Macintosh Plus re-integrated the numerical keypadTwentieth Anniversary Macintosh Keyboard
and became the standard for all successive(M3459)
keyboards. However, it also marked the last ofBundled with the Twentieth Anniversary Macintosh
the beige Apple-II-era designs which were usurpedin 1997, this keyboard once again excluded an
by the newer Snow White design language.integrated keypad, though unlike the Adjustable
From the end of 1986 until 1998, all new AppleKeyboard none was offered. Based around a
keyboards were "Platinum" gray and connectedPowerBook form factor it also including an optional
via the Apple Desktop Bus (ADB). The Apple IIebuilt-in trackpad and leather palm rests. This was
and IIc line continued with integrated keyboards,the last ADB Keyboard Apple would produce and
as did the PowerBook portable line of course,not sold separately.
those of the latter being a darker gray colorApple USB Keyboard (M2452)
called "Smoke". During the 90s, Apple offeredApple USB Keyboard (Bondi blue)
various styles of keyboard, including extendedReleased and sold with the iMac in 1998 this
keyboards which matched the features and sizebecame the new standard for all Macintosh
of their IBM PC AT counterparts.models for the next two years. It was the first
The release of the first iMac introduced ato use translucent plastics, first in Bondi blue, then
matching compact, translucent-plastic keyboardin a darker gray in the PowerMac line and
based on laptop technology and marked thefruit-colored for each of the five first color
transition from ADB to USB. In July 2000, it wasvariations of the iMac. It had a built-in adjustable
replaced with the full-sized Pro Keyboard, havingstand. It also marked a return to the standard
slightly translucent black keys and a clear case.keyboard with integrated keypad with the
The PowerBook and iBook integrated keyboardsenhanced cursor keys above the keypad. Also,
followed suit with translucent keys first in bronzethe keyboard had a power button on the top
(PowerBook), then in black (PowerBook) andright side. This keyboard works with Windows
white (iBook). Coinciding with the introduction ofexcept for the power button and f13-f16.
the iMac G4 in 2002, Apple started making itsApple Pro Keyboard (M7803)
keyboards white. On the Bluetooth WirelessOriginally introduced as the Apple Pro Keyboard in
Keyboard, Apple removed the adjustable feet2000, but three years later Pro was dropped
from the back of the keyboard, giving it a solidfrom the title. This keyboard reintroduced the
base. This design was later quietly introduced onadditional extended function keys last seen in the
the wired version. The PowerBooks addedApple Design Keyboard and debuted in a clear
another color, opaque aluminum withcase with black keys. Later a white key version
sometimes-backlit translucent legends, to thewas also offered. One major departure from all
array of keyboard styles in use.previous ADB & USB keyboards was the
Current Keyboardsremoval of the remote power key.
On August 7, 2007 Apple introduced their latestApple Keyboard Essentially the same Apple Pro
keyboards as of October 2008[update]. The newKeyboard, like many earlier products, Apple
model is much thinner than its predecessors,usurped and re-used its name (see SuperDrive).
requiring less wrist flexing and a slightly lower handFollowing the name change, it was available only in
position for most users. Taking a cue from thewhite.
portables, it has an aluminum enclosure, and theApple Keyboard
USB ports have been, once again, relocated toApple Keyboard (German) (A1048)
the right and left ends of the keyboard case.(A1048) Keeping the name of its predecessor, in
Software function and hardware control keys2005 the case of the "Apple Keyboard" was
have a new arrangement, and there are keyschanged completely, eliminating the frame
associated with specific features of Mac OS X,enclosing the keys.
such as Dashboard. In order to properly use(A1243) The Apple Keyboard introduced in 2007
these new features, a computer must behas a solid aluminum enclosure, as does the
updated as of the initial ship date of thematching but compact Apple Wireless Keyboard.
keyboards, usually with the built-in SoftwareThis keyboard is the first to omit the
Update.long-enduring Apple logo (solid or open) that was
On March 3, 2009 Apple introduced an additionaloriginally included to support using the keyboard
keyboard to their latest line of keyboards. Thewith the Apple IIgs from the Command key after
new keyboard is similar to the wireless keyboard21 years, even though software and official
due to the absence of the numeric keypad,documentation had always referred only to the
however it is a wired keyboard with 2 USB 2.0key's other legend, . Compared to older versions
ports similar to the standard keyboard. Until thisof the Apple keyboard and to PC keyboards it is
time the typical keyboard with the numericreduced by approx. half the width of a standard
keypad was titled "Apple Keyboard", now thekey; accordingly, the Backspace, Enter and right
more-compact keyboard carries the name "AppleShift keys are narrower than on other keyboards.
Keyboard" and the standard keyboard withIt has two down-stream USB 2.0 ports, one at
numeric keys is titled "Apple Keyboard witheach end of the keyboard. This model was
Numeric Keypad".renamed Apple Keyboard with Numeric Keypad
Compatibilityafter the release of the A1242 model in March
ADB connector2009.
Apple's oldest keyboards utilizing the phone-styleApple Keyboard (A1242)
modular connectors are not compatible with any(A1242) Accompanying the Early 2009 iMac
other systems. However a few open-sourcerevisions is a new version of the wired keyboard,
projects have since developed adapters whichwhich omits the numeric pad as with its wireless
allow them to be used on newer equipment andcounterpart. The full keyboard with numeric pad
vice-versa.remains available as a built-to-order option for no
Apple's older ADB (Apple Desktop Bus) keyboardsextra charge, as well as a separate purchase.
are compatible with other ADB-based systems,Apple Wireless Keyboard
such as those from Sun, Next, HP, and Sony (andMain article: Apple Wireless Keyboard
vice-versa for their non-Apple ADB keyboards).(A1016) Introduced for the first time 2003 based
When using an USB adapter (such as the Griffinon the Bluetooth standard. It was essentially
iMate), they function similarly to Apple's later USBidentical to the revised Apple Keyboard offered
keyboards, although there can be problems usingthe same year.
such setups with later versions of Mac OS X.(A1255) In 2007 an updated model clad in
Although external ADB ports ceased to be usedaluminum was released, which, like the MacBook's
after the Power Macintosh G3 (Blue and White),keyboard, eliminated the integrated numeric
Apple still used ADB as the internal protocol forkeypad and special keys. It takes 3 AA batteries,
their laptop keyboards and trackpads until thewith the power button on the right side of the
last-generation PowerBooks and iBooks; for thiskeyboard opposite of the battery opening.
reason, ADB drivers can still be found in Mac OSSometime after March, 2009, the A1255 wireless
X 10.5 but not Mac OS X 10.6. Even with thesekeyboard layout changed to include more
operating systems, it is possible to use ADBinternational alphabetical characters. The shift keys
devices with an USB adapter.and return keys changed shape and size as did
Apple's USB keyboards are mostly compatiblethe graphics on a number of keys not limited to
with Windows computers, and can be remappedthe escape and command keys. The case of the
(for example in order to regain the functionality ofkeyboard remained identical barring the
PrintScreen or to swap the cmd and alt key,punch-outs for the different key shapes.
using some freeware software ); the Command(A1314) On October 20, 2009, the aluminum
key works as the Windows key, the Option keymodel was updated such that just two AA
as the Alt key, the Help key as the Insert key,batteries are needed instead of three; the only
and the Clear key as the Num Lock key. On thechange in physical appearance was the placement
slightly older all white models the volume keysof the plastic window for the bluetooth
function as they would on a Macintosh, and thetransceiver, which moved from the left side of
eject key has no function. With the new modelsthe keyboard's bottom to the center. Like the
released in August 2007 the volume, brightness,Magic Mouse released on the same date, it
Expos, dashboard, eject and media controls norequires Mac OS X 10.5.8 or later.
longer work without installing Apple's Boot CampSee also
software. This software allows for the volume,Newton Virtual KeyboardiPhone Virtual Keyboard
brightness, eject and media controls buttons toApple Mouse
work properly, though the Expos and dashboardTimeline of Apple products
buttons still fail to do anything because WindowsReferences
lacks this functionality.^ Image of the keyboard layout of a full-sized
The additional function keys placed where thealuminum Apple keyboard
Print Screen/SysRq, Scroll Lock, and Pause/Break^ New slimline iMac keyboard revealed?,
keys are on most IBM PC keyboards (F13/F14Electronista
through F15/F16) do not work as those keys in^ Keyboard Software Update 1.2 Apple official
Windows without a special driver. Apple has sincesupport site Retrieved 2007-09-18
released a driver, though it is only available^ Keyboard - Apple Store
bundled with Boot Camp.^ Sharpkeys
The USB keyboard is also combined with a^ Keytweak
two-port USB hub, with the hub being USB 1.1 on^ xkeycaps on linux
older keyboards and USB 2.0 on the August 2007^ Extended Keyboard II & AppleDesign
model.Keyboard Differences
Models^ Apple Wireless Keyboard manual (2009)
Built-in KeyboardsExternal links
Apple IIe built-in keyboardKeyboard
Apple II/II Plus Introduced in 1977 the Apple IIApple Developer Connection 12-in Powerbook G4
and II Plus came without a numeric keypad. ThereKeyboardv  d  e
was also a black keyboard manufactured for aApple hardware
Bell & Howell edition.Apples
Apple III/III Plus Introduced in 1980 the Apple IIIApple I  Apple II family (II II Plus, II Europlus, II
and III Plus introduced a numeric keypad andJ-Plus, IIe, IIc, IIGS, IIc Plus)  Apple III
special command keys.family (Apple III, III Plus)
Apple IIe/IIe Platinum The Apple IIe series,Lisas
introduced in 1983 once again eliminated theLisa  Lisa 2/5  Lisa 2/10
integrated numeric keypad, but offered anMacintoshdesktops
external one. However it did finally offer a "delete"Compact Macintosh family (128K, 512K, XL, Plus,
key. In 1987 with the introduction of the Platinum512Ke, SE, SE/30, SE FDHD, Classic, Classic II,
IIe, the keypad was re-integrated and theColor Classic, Color Classic II)  Macintosh II
keyboard was updated to conform to the newlyfamily (II, IIx, IIcx, IIci, IIfx, IIsi, IIvi, IIvx)  LC
released Apple Desktop Bus Keyboard.family (LC, LC II, LC III, LC 475, LC III+, LC 520,
Apple IIc/IIc Plus Introduced in 1984 the Apple IIcLC 550, LC 575, LC 580, LC 630, 5200 LC, 5260
was the first portable keyboard and lacked aLC, 5300 LC, 5400 LC)  Performa family 
keypad. In 1988 the keyboard changed colorMacintosh TV  Quadra family (700, 900, 950,
from beige to Platinum and was revised to match800, 840AV, 610*, 650*, 660AV*, 605, 630) 
the layout of the Apple Desktop Bus keyboard,Centris family (610*, 650*, 660AV*)  Power
though still without provision for a keypad.Macintosh family (6100, 7100, 8100, 6200, 5200,
Macintosh Portable Apple's first truly portable9500, 7200, 7500, 8500, 6300, 5260, 5300, 5400,
computer, the Macintosh Portable released in 19897600, 6400, 4400, 5500, 6500, 7300, 8600, 9600,
had a full sized Apple Keyboard with optionalG3, B&W, G4, Cube, G5)  20th Anniversary
built-in numeric keypad or trackball mouse.Mac  iMac family (G3, G4, G5, Core, Core 2) 
PowerBook From 1991 to 2005 all of Apple'seMac  Mac Pro  Mac mini family (G4; Core;
portable PowerBook computers have included aCore 2)
smaller keyboard ranging in color from dark gray,Laptops
to black, translucent bronze & charcoal andMacintosh Portable  PowerBook family: (100
finally an aluminum finish with backlighting. Alongseries (100, 140, 170, 145, 160, 180, 165, 145B,
the way, they have also included special function165c, 180c, 150)  Duo series (210, 230, 250,
keys and embedded keypads.eMate The dark270c, 280, 280c, 2300c)  500 series (520, 520c,
green translucent keyboard of the eMate540, 540c, 550c)  190 series (190, 190cs)  5300
introduced in 1997 was essentially an Appleseries (5300, 5300cs, 5300c, 5300ce)  1400
Newton keyboard.iBook In 1999 The iBook seriesseries (1400c, 1400cs)  3400c  2400c  G3
introduced the first ever white keyboards.series (Wallstreet, Lombard, Pismo)  G4
Debuting in a transparent finish, the later modelsseries (Titanium, Aluminum))  iBook family: (G3
were opaque.series (Clamshell, Dual USB)  G4)  MacBook
MacBook/MacBook Pro/MacBook Air In 2006family: (MacBook series (Core; Core 2)  Pro
Apple introduced the MacBook series ofseries (Core; Core 2)  Air series (Core 2))
computers. The MacBook Pro keyboard continuedServers
the aluminum treatment of the PowerBook line,Workgroup Server (95, 60, 80, 6150, 8150, 9150,
while the MacBook remained white like the iBook7250, 8550, 7350, 9650)  Network Server (500,
before it and introduced a black model as well.700)  Macintosh Server (G3, G4)  Xserve (G4,
The MacBook Air also used black keys. TheCN; G5, CN; Intel)
introduction of Unibody MacBooks saw aConsumerelectronics
unification across all of Apple's keyboards to useApple TV  AppleFax  Conferencing Camera
black keys, the sole white keys remaining on the100  Cinema Display  iPad  iPhone 
white MacBook.iPod (Classic, Photo, Mini, iPod+HP, Shuffle, Nano,
Apple Numeric Keypad IIe (A2M2003)Touch)  Newton (MessagePad, eMate 300) 
Apple Numeric Keypad IIePowerCD  Powered Speakers  Printers (Color
The Numeric Keypad IIe was Apple's firstPrinter, Dot Matrix Printer, ImageWriter,
external keypad. Released as an option specificallyLaserWriter, Scribe Printer, SilenType, StyleWriter,
for the popular Apple IIe computer in 1983, itPortable StyleWriter)  QuickTake  Scanner
helped correct some of the II series'Other projectsand accessories
shortcomings. Later the Platinum IIe would300 Modem  3.5" Drive  AirPort (Card, Base
incorporate the numeric keypad into its built-inStation)  AppleCD  Disk II, IIc  Hard Disk
keyboard.20, 20SC  IIe Card  Interactive Television
Lisa Keyboard (A6MB101)Box  iPod accessories (Dock Connector, Camera
The first keyboard not to be integrated into theConnector, iPod Hi-Fi, Nike+iPod)  iSight 
CPU case like the Apple II & III series beforeKeyboard (Adjustable, Extended, Pro, Wireless) 
it. Designed for use with the Apple Lisa, it wasLocalTalk  Mouse (Pro, Wireless, Mighty,Magic) 
included with the system introduced in 1983. LikePaladin  Peripheral Cards (80-Column Text,
the Apple III before it, it was intended to be aAccelerators, Clocks, Processors, Serials)  Pippin 
business computer and included an integratedProFile  Remote  Time Capsule  USB Modem 
numeric keypad. Like all Apple computers beforeXserve RAID
it, it came in a beige case to match the CPU andItalics indicate hardware currently produced. See
connected by a unique TRS connector. In additionalso: Apple hardware before 1998, Apple
it carried over the use of the "open" Apple keyhardware since 1998.v  d  e
from the Apple III as a Command Key (though itKeyboard keys
was represented by the "close" Apple character)Dead keys
and included a pullout reference guide hidden underCompose
the keyboard.Modifier keys
Macintosh Keyboard (M0110)Control  Shift  Alt/Option (Apple)  AltGr 
Macintosh KeyboardCommand/Meta (Apple/MIT/Sun keyboards) 
Introduced and included with the original MacintoshWindows  X  Super  Hyper  Fn (compact
in 1984, it debuted without arrow keys to controlkeyboards)
the cursor nor an integrated numeric keypad. ItLock keys
used a unique telephone-cord style connector toScroll lock  Num lock  Caps lock
the case. It also introduced a unique CommandNavigation
Key similar to the "open" Apple Key on the Lisa.Arrow  Page Up/Page Down  Home/End
Macintosh Numeric Keypad (M0120)Editing
Like the Apple IIe before it, the MacintoshReturn/Enter  Backspace  Insert  Delete 
provided an optional external keypad which alsoTab  Space bar
included arrow keys that daisy chained to theMisc.
CPU via the telephone-cord connectors. ThoughSystem request/Print screen  Break/Pause 
introduced with the Macintosh in January, 1984,Escape  Menu  Numeric keypad  Function 
Apple did not ship it until September 1984 at aPower management (Power, Sleep, Wake) 
retail price of US$99.Language input  Any key  Macro key
Macintosh Plus Keyboard (M0110A)Categories: Apple Inc. hardware | Apple Inc.
Introduced and included with the Macintosh Plus in