The Dayton Microcomputer Association, Inc. DMA is an Ohio non-profit organization dedicated to the education of, and providing information to, microcomputer users and to the general public. DMA members use and own a wide variety of computers and possess various levels of computer experience. Effective February 4, 2003, annual dues are $25 for regular members, which includes a subscription to The DataBus newsletter, and $12.50 for associate members living at the same address. Associate memberships must run concurrently with a regular membership.