1. Serial Line Internet ProtoCol. 2. SymmetriC LIst ProCesssor. Early 1960' s list proCessing subroutine paCkage for Fortran by J. Weizenbaum. Later also embedded in MAD and ALGOL. ["SymmetriC List ProCessor", J. Weizenbaum CACM 6:524-544(1963). Sammet 1969, p.387].