/proc/cpuinfo, what cpu flags mean?

I alwas keep forgetting what CPU flags mean in Linux and what CPU architecture I have.

http://www.gentoo-wiki.info/Gentoo:/proc/cpuinfo

Intel flags (This table is currently identical with /usr/include/asm/cpufeature.h. Hopefully some hardware god will share his wisdom and expand this table. )

Flag	Description	Common in processor types
fpu	Onboard (x87) Floating Point Unit
vme	Virtual Mode Extension
de	Debugging Extensions
pse	Page Size Extensions
tsc	Time Stamp Counter: support for RDTSC and WRTSC instructions
msr	Model-Specific Registers
pae	Physical Address Extensions: ability to access 64GB of memory; only 4GB can be accessed at a time though
mce	Machine Check Architecture
cx8	CMPXCHG8 instruction
apic	Onboard Advanced Programmable Interrupt Controller
sep	Sysenter/Sysexit Instructions; SYSENTER is used for jumps to kernel memory during system calls, and SYSEXIT is used for jumps back to the user code
mtrr	Memory Type Range Registers
pge	Page Global Enable
mca	Machine Check Architecture
cmov	CMOV instruction
pat	Page Attribute Table
pse36	36-bit Page Size Extensions: allows to map 4 MB pages into the first 64GB RAM, used with PSE.
pn	Processor Serial-Number; only available on Pentium 3
clflush	CLFLUSH instruction
dtes	Debug Trace Store
acpi	ACPI via MSR
mmx	MultiMedia Extension
fxsr	FXSAVE and FXSTOR instructions
sse	Streaming SIMD Extensions. Single instruction multiple data. Lets you do a bunch of the same operation on different pieces of input in a single clock tick.
sse2	Streaming SIMD Extensions-2. More of the same.
selfsnoop	CPU self snoop
acc	Automatic Clock Control
IA64	IA-64 processor Itanium.
ht	HyperThreading. Introduces an imaginary second processor that doesn't do much but lets you run threads in the same process a bit quicker.
nx	No Execute bit. Prevents arbitrary code running via buffer overflows.
pni	Prescott New Instructions aka. SSE3
vmx	Intel Vanderpool hardware virtualization technology
svm	AMD "Pacifica" hardware virtualization technology
lm	"Long Mode," which means the chip supports the AMD64 instruction set
tm	"Thermal Monitor" Thermal throttling with IDLE instructions. Usually hardware controlled in response to CPU temperature.
tm2	"Thermal Monitor 2" Decrease speed by reducing multipler and vcore.
est	"Enhanced SpeedStep"