When Apple quietly bought a small semiconductor company earlier this year called “PA Semi,” the move sparked a storm of speculation. Was Apple looking for new low-power processors for its iPhone? Was it aiming to develop new processors for unannounced but rumored Mac tablets? Or was Apple just buying PA Semi to snag some top-notch engineers? It turns out that one of those engineers, reportedly Wei-han Lien, the senior manager of Apple’s chip team, let the PA Semi cat out of the bag this weekend by posting details of his job on LinkedIn, a professional and career-oriented social network.