In Korean, nak-si (ëì) means fishing, and is used to refer to Internet trolling attempts, as well as purposefully misleading post titles. A person who recognizes the troll after having responded (or, in case of a post title nak-si, having read the actual post) would often refer to himself as a caught fish.
Prometric ID * (What is this?) Your Prometric ID is a unique number assigned to you that can be located on your: Application Status Report emailed to you after your application is received Authorization to Test letter emailed or mailed to you after your test is scheduled Online Dashboard if you applied online
In universities courses are (usually) marked by numbers, since they are hard to remember by name. First number corresponds to study year this course should be taken in, followed by 2 (or 3) course id. Usually the same subject course has greater id if they have to be taken in the same year. Therefore lower ids are usually assigned to basic courses.