Stationary vs. Stationery

It's a bugger of a word, among many other in the English language--like principal and principle, bear and bare, there, their and they're--to name a few. I just thought you should know the correct uses for stationary and stationery.

stationary |ˈstā sh əˌnerē|
adjective
not moving or not intended to be moved : a car collided with a stationary vehicle.
• Astronomy (of a planet) having no apparent motion in longitude.
• not changing in quantity or condition : a stationary population.
ORIGIN late Middle English : from Latin stationarius (originally in the sense [belonging to a military station] ), from station- ‘standing’.

stationery |ˈstā sh əˌnerē|
noun
writing paper, esp. with matching envelopes.
• writing and other office materials.

Good, now you know.