Editing Computer mouse (section)

=== Apple Desktop Bus ===
[[File:Apple Macintosh Plus mouse.jpg|thumb|[[Macintosh Plus|Apple Macintosh Plus]] mice: beige mouse (left), platinum mouse (right), 1986]]

In 1986 [[Apple Inc.|Apple]] first implemented the [[Apple Desktop Bus]] allowing the [[daisy chain (electrical engineering)|daisy chaining]] of up to 16 devices, including mice and other devices on the same bus with no configuration whatsoever. Featuring only a single data pin, the bus used a purely polled approach to device communications and survived as the standard on mainstream models (including a number of non-Apple workstations) until 1998 when Apple's [[iMac]] line of computers joined the industry-wide switch to using [[Universal Serial Bus|USB]]. Beginning with the Bronze Keyboard PowerBook G3 in May 1999, Apple dropped the external ADB port in favor of USB, but retained an internal ADB connection in the [[PowerBook G4]] for communication with its built-in keyboard and trackpad until early 2005.