Horology is the formal term for the science of timekeeping. Both clock and watchmaking have seen many significant technological advancements in modern times as they progressed from the early days of the spring powered clock up to IBM’s Linux Wrist Watch project. Most advancements in horology in the modern era have focused on three areas: 1) accuracy 2) miniaturization and 3) source of power.

a linux wrist watch - i want one (even if it is a bit ugly at the mo)

WatchPart.co.uk Supplying Watch Parts » 12 Major Technological Innovations in Modern Horology