The keyboard attached to the computer via the Apple Desktop Bus (ADB).

It is definitely a Snow White design, which elements form the basis for the subsequent Apple Desktop Bus Mouse.

DIN plug (also used for Apple Desktop Bus)

Similarly, the Apple Desktop Bus found on all Macs was deemed too proprietary for PC's.

Apple Desktop Bus (mini-DIN4)

Apple Desktop Bus (ADB) is a bit-serial computer bus connecting low-speed devices to computers.

Prior to the iMac line of systems, Apple used the proprietary Apple Desktop Bus for its keyboard connector.

Around back, the SE's Apple Desktop Bus allows as many as 16 different input devices to be attached to the SE.

On Apple Desktop Bus keyboards, a power key ( ), used to turn on computers that supported it (and to type the Mac three-finger salute).

Around back are two serial ports, two Apple Desktop Bus ports and one SCSI port.

USB represents a significant improvement in performance and ease of use over older connection schemes like the Apple Desktop Bus (ADB).

Prior to USB, Apple created the Apple Desktop Bus (ADB) interface.

Apple Desktop Bus / mini-DIN (typical uses: low speed external peripherals; such as keyboard, mouse, or joystick)

Like the newer Macintosh computers to come, such as the Macintosh SE, it used the new Apple Desktop Bus for its keyboard and mouse.

In September 1986 Apple continued a year of major change by converting its mice and keyboards to the Apple Desktop Bus (ADB).

The Macintosh Quadra 660AV on which this is being written has the Apple Desktop Bus Mouse II, a smooth beast with one button.

The Quadra 605, like most other Macintoshes manufactured before 1999, includes an Apple Desktop Bus port for use with a keyboard/mouse or other low-speed low-power peripherals.

The Apple Desktop Bus (ADB) was introduced with the Macintosh II and Macintosh SE.

In 1988 the keyboard changed color from beige to Platinum and was revised to match the layout of the Apple Desktop Bus keyboard, though still without provision for a keypad.

Used the Apple Desktop Bus (ADB), introduced with the Apple IIGS, for keyboard and mouse interface.

The Apple Desktop Bus, which for a long time was the standard for most input peripherals for the Macintosh, first appeared on the Apple IIGS.

It was the first commercially released Apple mouse to use the USB connection format and not the Apple Desktop Bus (ADB).

(In their place, I use an old Apple Extended Keyboard II and an Apple Desktop Bus Mouse II.)

In 1987 with the introduction of the Platinum IIe, the keypad was re-integrated and the keyboard was updated to conform to the newly released Apple Desktop Bus Keyboard.

Though Apple switched all other keyboards to Apple Desktop Bus connectors by this time, this keyboard was manufactured unchanged for 4 more years until the Plus was discontinued in 1990.