Do colleges really track if you attended an open house, emails, admissions session, tours, etc?

[marrech]

Hello everyone, thank you for the replies. I am stuck on some of the acronyms in the responses. I am a newby to this site. Can you help me?

EA=Early Action
AO=Admission officer
CDS
SCEA
REA
ED=Early Decision
RD
EC
Us