(SWL) /swil/ An industrial strength dialect of Pascal that allowed multiple source code files, originally developed at Control Data Corporation (CDC) prior to 1973. Development continued at the Integrated Systems Laboratory. SWL was adopted by NCR as its corporate operating system and compiler implementation language (1978-1982+). The NCR SWL dialect was renamed NCRL (NCR Language) in 1981 and continued development [until ?].