A limited number of parking spots are available on a first come, first served basis at Harvard's Broadway Garage on Felton Street in Cambridge. (Felton Street runs one-way from Cambridge Street to Broadway.) At the entrance, tell the guard you are attending the Digital Archive Conference. Take the ticket you receive with you for entrance to the garage when you leave the conference (via a swipe mechanism) and for exiting the parking garage. Parking is on the third floor and above.