I recently booked a flight through a travel agency and I found this section in my booking confirmation they sent to me. What does "EQP is 'Open'" mean? I did confirm outwards and return legs with them so it shouldn't mean "open ticket". What exactly does "EQP" refer to?
"EQP" stands for Equipment (or frequently "Equipment type"), and would normally describe the aircraft type being used for the flight (eg, Boeing 747, Airbus A380, etc).
"Open" could refer to the fact that the aircraft type hasn't yet been decided upon, although that is unlikely now days. More likely, it's simply a field that hasn't passed over correctly from the airlines booking system to whatever system your travel agent is using. There are multiple different systems used by various airlines/travel agencies, and it's not uncommon to find fields like this that frequently aren't shown on a confirmation not being correctly populated as a result.