communications A popular packet-oriented protocol from

Columbia University for transferring text files and

binary files on both full-duplex and half-duplex 8 bit

and 7-bit serial connections in a system- and

medium-independent fashion, and implemented on hundreds of

different computer and operating system platforms. On

full-duplex connections a sliding window protocol with

selective retransmission provides excellent performance and

error recovery characteristics. On 7-bit connections, locking

shifts provide efficient transfer of 8-bit data.