detcas(1) on Linux
The text 5b699dc47ecf, as Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it. The page shows this text now.
Determinant Configuration Interaction / Complete Active Space Self-Consistent-Field Program