Complex sentence: The mimeograph machine (commonly abbreviated to mimeo) or stencil duplicator, along with spirit duplicators and hectographs were for many decades used to print short-run office work, classroom materials and church bulletins.
Split into simpler sentences: The mimeograph machine (commonly abbreviated to mimeo) or stencil duplicator. These machines, along with spirit duplicators and hectographs were for many decades used to print short-run office work, classroom materials and church bulletins.