Overhead includes two major categories of cost, operations overhead and general and administrative overhead. Operations overhead includes costs that are not 100 percent attributable to the activity being competed but are generally associated with the recurring management or support of the activity. General and administrative overhead includes salaries, equipment, space, and other tasks related to headquarters management, accounting, personnel, legal support, data processing management, and similar common services performed external to the activity, but in support of the activity being competed. A standard twelve percent overhead factor is an estimated federal agency overhead factor that is calculated in agency and public reimbursable cost estimates for streamlined and standard competitions.