A tape cassette that includes a generally rectangular box-like housing having a top wall, a bottom wall, and a side wall defining a periphery of the housing, at least one tape wound and mounted within the housing in a tape containing area defined within the periphery, and a pair of cavities extending from the bottom wall and disposed between the tape containing area and the periphery at opposite ends of a diagonal of the generally rectangular box-like housing, the diagonal connecting a first corner portion and a second corner portion of the generally rectangular box-like housing.