Apple Desktop Bus (ADB) Introduction

Apple introduced the Apple Desktop Bus (ADB) with the Macintosh SE and Macintosh II. ADB was a proprietary bit-serial peripheral bus connecting low-speed devices like keyboards, mice, and eventually graphics tablets.

Significance

ADB provided a standardized, daisy-chainable port that enabled manufacturers like Wacom to easily connect specialized input devices to Macintosh computers, laying the groundwork for integrated tablet support.