뒤늦은 댓글이지만, SD는 '숏다리'의 약자라고도... -- Businesses used to be like christianity; if you were faithful and obedient, you could obtain bliss in the afterlife of retirement. Now it's more of a reincarnation model. If the worker learns enough in his current job, he can progress to a higher level of employment elsewhere. <Dogbert>