A very short technical report
Not many engineers seem to like writing. This might have been why the April 27, 1947 Stanford Linear Electron Accelerator Project Report No. 7 was so short. This report was so short that I'll quote it in its entirety here:
We have accelerated electrons.
You can read more about this report here, and can even see what this short and to-the-point report looked like. Although this doesn't always happen, this is one case where reading the original paper really isn't so bad.