Searching for RPG compilers, I found this IBM notice: https://www.ibm.com/support/pages/osvs-rpg-ii-compiler110-wi...
General Availability
02-Nov-1981 , 281-999
No longer available for order, Withdrawn from Market
05-Dec-2022 , 922-053
Transition to Extended/Sustained or End of Support
30-Sep-2023 , 922-078
Completion of Extended, Sustained, Extension availability
30-Sep-2023