Paul Doornbusch has posted an interesting summary of how technological developments since 1906 relate to musical developments during the same timeframe.

This is a somewhat extended and updated version based on the same item originally published in The Oxford Handbook of Computer Music late in 2009. When attempting such a chronology or timeline, even one such as this which mostly ignores the commercial music world, it quickly becomes apparent that there is so much activity that it will necessarily be incomplete. It is impossible to list all of the events which have taken place in any locale or time. Given these limitations, perhaps this is still of some limited use as some sort of chronological overview of computer music research and related events.

Chronology of Computer Music and Related Events 1906 – 2010