gnu-apl: gnu-apl (Free APL interpreter) gnu-apl: gnu-apl: GNU APL is a free interpreter for the programming language APL. The gnu-apl: APL interpreter is an (almost) complete implementation of ISO gnu-apl: standard 13751 aka. Programming Language APL, Extended. gnu-apl: gnu-apl: gnu-apl: gnu-apl: gnu-apl: Homepage: https://www.gnu.org/software/apl/ gnu-apl: