It probably does actually mean "File Transfer Protocol". Its not uncommon (or wasn't at least) to find workflows that rely on data files of a specific format (to varying degrees) being FTP'd into the right server and then processed by that server.

For example, I found this [1] randomly while googling.

1: https://www.ibm.com/docs/en/order-management-sw/9.4.0?topic=...