Acucobol uses neither termcap nor terminfo. Acucobol comes with a reference manual and a user's guide. They are both loose-leaf and about 1,000 pages apiece. Acucobol's indexed file system is called Vision, which is proprietary to Acucobol. Vision files have keys and data combined into a single file, and the index structure is b-tree.
Vision is efficient and reliable.
In the standard Acucobol run-time, the table entries point to Vision functions. You can replace this table with a different one, so that the table entries point to D-ISAM or Codebase functions. However, unless the program has no user interface whatsoever, you're probably going to want to do some conversion work. It works perfectly well, but my experience has been that it's still better to rearrange the way in which data is displayed on and accepted from terminal screens, because Acucobol allows you to do this in a less tedious fashion. There's a substantial pile of application software and add-ons available for Acucobol.