which is the best tool to monitor my cars OBD II?

ok so i wanna be able to see whats going on inside my cars OBD , i wanna be able to see temps, fuel pressure, if the car is running on an open loop or a close loop, mainly this last one the open or close loop. i wanna able able to see that so my question is whats the best or whats a decent tool monitor all this things or how can i tell if my car is even going from a close to an open loop.

Interesting topic about computers/technology?

I am thinking on entering a scholarship essay contest, but I have to pick an original topic related to computers/technology.
Last year’s winner the student wrote about why you shouldn’t do online banking at Starbucks. Very clever and original.

Every idea is appreciated.