I know nothing of any pure APL for p9 or related systems, but theres A+: http://www.aplusdev.org/ which is GPLed, so could, theoretically, be ported. On Sep 06, 2018, at 02:43 PM, Ethan Gardener wrote: Is there an implementation of APL or a related language for Plan 9? -- The lyf so short, the craft so long to lerne. -- Chaucer