The aircraft for a UA flight I'm trying to book is listed as 32S. Specifically, it's UA 708, ORD-PVD in mid-June. 32S was the old shorthand for Ted planes. Why is this still showing up now, and is 32S any different from 320? The seatmap looks like a standard current 320, with coach starting at row 6. Other 320 routes are listed as "320". What gives? Maybe this has gone on for some time, but I haven't noticed it before, and TOBB won't let you search on "32S".