A computer system that includes a plurality of servers, and a shared IO subsystem coupled to each of the servers and to one or more IO interfaces. The duration of the burst is preferably in the range of 10 ns to 500 ns; and the pulse width of each laser pulse within the burst is generally shorter than 25 ps, preferably shorter than or equal to 10 ps, and most preferably about 10 ps to 100 fs or shorter. 2% w or more, based on the weight of the spent epoxidation catalyst. The first hook has a first screw thereon, and the second hook has a second screw thereon.