GOTV - Get Out The Vote
DVC - Direct Voter Contact
VBM/ABR - Vote By Mail/Absentee Ballot Request
HOP - Head On Pillow (the campaign version of COB
)
CD - Congressional District
HD - State House District
SD - State Senate District
NTM - Neighborhood Team Member
NTL - Neighborhood Team Leader
FO - Field Organizer
RFD - Regional Field Director
DFD - Deputy Field Director
FD - Field Director
There are many more, but I think this gives a good enough idea.