Desktop:
K - Processors that have unlocked CPU clock multipliers
S - Energy efficient processors that have comparable clock speeds as compared to standard models
T - High energy efficient processors that have lower clock speeds as compared to standard models
Mobile:
M - Mobile processors.
LM - Low voltage mobile processors.
UM - Ultra low voltage mobile processors.
QM - Quad-core mobile processors.
XM - Extreme quad-core mobile processors that feature unlocked Turbo multipliers.
E - Embedded mobile processors.
LE - Low voltage embedded mobile processors.
UE - Ultra low voltage embedded mobile processors.
QE - Quad-core embedded mobile processors