While GNU APL has, as its primary focus, adherence to the APL2 ISO 13751 standard, it is open to enhancements which do not violate compatibility with APL/2. ...
Whether you are an old hand at APL, or someone just discovering the language, having the symbols in the standard layout right there on your keyboard is a great help... dedicated APL keyboards are pretty expensive, so consider these stickers that let one adapt any standard desktop or laptop keyboard! ...
Essential Beginner Resources for APL Programming
APL At A Glance ...
New to APL? Start here! ZARK's APL Tutorial ( tutorial.apl2000.com )
GNU APL adds the Nub Sieve (Unique Mask) monadic ≠ operator ( aplwiki.com )
While GNU APL has, as its primary focus, adherence to the APL2 ISO 13751 standard, it is open to enhancements which do not violate compatibility with APL/2. ...
APL Keyboard Sticker Set ( www.tindie.com )
Whether you are an old hand at APL, or someone just discovering the language, having the symbols in the standard layout right there on your keyboard is a great help... dedicated APL keyboards are pretty expensive, so consider these stickers that let one adapt any standard desktop or laptop keyboard! ...