Sciences: Because the primary purpose is to study data and fixed principles in an objective way, personal experience is less likely to have a place in this kind of writing. Often, as in a lab report, your goal is to describe observations in such a way that a reader could duplicate the experiment, so the less extra information, the better. Of course, if you’re working in the social sciences, case studies—accounts of the personal experiences of other people—are a crucial part of your scholarship. (See our handout on writing in the sciences for more information.)
In 2007, Southwest modified their boarding procedure by introducing a number. Each passenger receives a letter (A, B or C) and a number 1 through 60. Passengers line up in numerical order within each letter group and choose any open seat on the aircraft as part of Southwest's open seating policy.  According to a 2012 study by Mythbusters , this is the fastest method currently in use for non-first class passengers to board a plane; on average, it is 10 minutes faster than the standard method used by most airlines of boarding from the back frontward.