How ten-pin bowling alley works?

I have been to a bowling sports center this morning, located somewhere in JB. After watching for almost an hour of game plays, the thought of how-on-earth does the whole automatic bowling system work? Right from score calculations, to the return of such heavy-balls and most importantly, the collection and rearrangement of all fallen pins. 

Bearing that thought in mind, I searched over the internet for answers right away after getting home. Below are 2 videos which I personally feel do answer my curiosity. 

Video 1 (Source: YouTube)

Video 2 (Source: YouTube)

After watching these videos, I bet next time when you go for any bowling game, you will appreciate how the great mechanical system working behind the scene.