1. A data processing system having protected system files, said data processing system comprising: memory means for storing logic signal groups; processing means for manipulating logic signal groups in said memory means in accordance with instruction signal groups; interaction means for permitting a user to enter instruction signal groups for said processing means; indentification means coupled to said interaction means for relating preselected attributes with said user; address means coupled to said interaction means for retrieving a logic signal group associated with an instruction signal group, said address means also for associating preestablished attributes with said associated logic signal group; and comparison means coupled to said address means and to said identification means for comparing said preselected attributes with said preestablished attributes, said comparison means preventing said associated logic signal group from being manipulated by said processing.