Your desktop computer was called a microcomputer in the era when normal computers filled rooms. Reason's a depleted uranium gatling gun which is man-portable...

Your desktop computer was called a microcomputer in the era when normal computers filled rooms. Reason's a depleted uranium gatling gun which is man-portable... that's small. Hiro is counterattacked by guns of a similar type which are way bigger.[0] Perhaps I should have specified "small for what it is", though. [0] Something like http://en.wikipedia.org/wiki/Phalanx_CIWS http://en.wikipedia.org/wiki/Phalanx_CIWS , as I recall.