This article presents a detailed timeline of events in the history of computing. For a narrative explaining the overall developments, see the related History of computing.
Stephen White: A Brief History of Computing, http://ox.compsoc.net/~swhite/history. An excellent Computer history site; the above is a modified version of his timeline, used with permission.
... series of proteins embedded in a biological membrane that transfers high-energy electrons from one to another, accomplishing various activities along the way as the electron ...