This OID reports the data access width, in bits, supported by the memory range described by this EISA configuration entry. An admin uses this to know whether the board's memory interface operates as an 8-, 16-, or 32-bit-wide path, which affects the transfer performance of that memory window. For example, a data size of 16 would tell the admin the memory range is accessed 16 bits at a time rather than the full 32-bit EISA bus width.