unformatted system services造句

Within SNA there are three types of data stream to connect local display terminals and printers; there is SNA Character String ( SCS ), used for LU1 terminals and for logging on to an SNA network with Unformatted System Services ( USS ), there is the 5250 data stream mainly used by minicomputers / servers such as the System / 34, System / 36, System / 38, and AS / 400 and its successors, including System i and IBM Power Systems running IBM i.
It's difficult to find unformatted system services in a sentence. 用unformatted system services造句挺难的