The county commission is empowered and authorized to facilitate and expedite the assessment, calculation, extension and collection of taxes, and may by order prescribe a method or system to facilitate the assessment, calculation, extension and collection of taxes. Such system shall specify the kind of books and forms except assessment blanks to be used by the assessor, county clerk and collector and shall prescribe the method and manner of calculating, extending or computing the taxes and the form and manner of preparation of tax bills. To facilitate and expedite the assessment, calculation, extension and collection of taxes, an adequate system of bookkeeping and accounting may be established and the necessary mechanical devices or equipment shall be procured and employed for this purpose and said commission shall designate the manner of the performance of the duties required to make such system efficient and operative.