680 Paper tape notes:

The .S files are the S-records from the MITS paper tapes, with some notes at the beginning.

The .BIN files are the exact same files, but with even parity as it was on the MITS paper tapes, and with the null leader and trailer. In the case of the Basic tape, 680BASIC.BIN also has teh "END OF FILE 680 BAS." text at the end of the tape, punched exactly as it was on the MITS tape.