abbreviations

I recently got hired at Target in softlines! I totally enjoy it. Could be my location and team members that make it great. Anyways I got my new schedule and I’m confused about some abbreviations if you can help me out. I usually work kids, men’s, and RTW. But now I have FR- I’m sure that ones...

I saw that one of my team members is working on 'Signing' next week. The hours are from 5-11 (which is an hour past our closing time of 10 PM). Under the hours there's the acronym ADT, what does that mean? Also, what do signing team members do and do they stay in the store after it's closed?

We got our schedules for the week of the 30th today. On one of my shifts, the time is listed, the position (cashier), and then it says SCO. Does anyone have any clue what this means?