My mom used one in the 70s and 80s for accounting and billing in our local village. As I recall although they had multiple terminals to access it these were sha

My mom used one in the 70s and 80s for accounting and billing in our local village. As I recall although they had multiple terminals to access it these were shared, you didn’t have a terminal on the desk. You’d pick the application you were going to use from a text menu, enter your identifier (no password), and make your entries. Actual billing runs or other accounting runs were done in batch overnight. When they upgraded to AS/400s everyone had PCs on their desks and used 5250 terminal emulators to access the system over SNA/APPC.