040000 tree 149f0dbb930f7ad5169fc7d5dfeac54227d3bcc0	kvm
040000 tree 0967c642039673943251b455441b0fe3620c77f5	ovm
040000 tree b94fbdcf0cb57b60fb4ee5d8f20a197a1e1733f4	simulator
040000 tree 0975d4bc8a8c4dc3a234c8a55459a272434349f1	vmware
040000 tree 61cac3b1ecab6439110922319ea0d5eaa9d5a9e7	xen