> On 2021, Nov 23, at 2:04 PM, Al Kossow <aek at bitsavers.org> wrote: > > On 11/23/21 10:54 AM, Ron Natalie wrote: > >>> I have a vague recollection that PL/X was a PL/I variant used for internal development on VM/CMS. > > PL/S PL/S also led to PL.8 which was used for the first IBM Risc