GNU APL is a free version of the programming language APL and is intended to be a full implementation of what is known as "Programming Language APL, Extended", "APL with nested arrays", or "ISO/IEC13751". GNU APL is distributed under the terms of the GPL, see file "COPYING" for details. More information about the installation of GNU APL can be found in the following files in the same directory as this file: INSTALL: general installation information (aka. ./configure) README-1-prerequisites: what else is needed to install GNU APL README-2-configure: GNU APL specific ./configure options README-3-keyboard: how to set up your keyboard for APL characters README-4-compliance: compliance information README-5-WINDOWS: notes for Windows users README-6-porting: notes for various operating systems