As a child you would wait. And watch from far away. But you always knew that you'd be the one that work while they all play. In youth you'd lay awake at night and scheme. Of all the things that you would change, but it was just a dream! Here we are.
A whitelist is a list or register of entities that provide a particular privilege, service, mobility, access or recognition. Entities on the list will be accepted, approved and/or recognized. Whitelisting is the reverse of blacklisting, the practice of identifying entities that are denied, unrecognised, or ostracised.
Whitelisting vs. Blacklisting. The whitelist/blacklist debate is far older than computers, and it's instructive to recall what works where. Physical security works generally on a whitelist model: if you have a key, you can open the door; if you know the combination, you can open the lock.