There are many insect orders, this may not be all:
A. Protura (proturans) P. Anoplura (sucking lice)
B. Collembola (springtails) Q. Thysanoptera (thrips)
C. Diplura (diplurans) R. Hemiptera (true bugs)
D. Thysanura (silverfish) S. Homoptera (aphids, cicadas,
hoppers)
E. Ephemeroptera (mayflies) T. Megaloptera (dobsonflies)
F. Odonata (dragonflies, damselflies) U. Neuroptera (lacewings,
antlions)
G. lattodea (cockroaches) V. Coleoptera (beetles)
H. Mantodea (mantids) W. Strepsiptera (Twisted-Wing
Parasite)
I. Isoptera (termites) X. Mecoptera (scorpionflies)
J. Grylloblattodea (Ice Insect) Y. Siphonaptera (fleas)
K. Dermaptera (earwigs) Z. Diptera (flies)
L. Plecoptera (stoneflies) AA. Trichoptera (caddisflies)
M. Orthoptera (crickets, grasshoppers, katydids) BB. Lepidoptera
(butterflies, moths)
N. Phasmatodea (walking sticks) CC. Hymenoptera (ants, bees,
wasps)
O. Mallophaga (chewing lice)