The earliest business data processing systems were based on batch processing of punchcards. Prepare cards off-line, feed a batch of them through the computer. (Why does one so often hear of payroll, specifically, being an early application of such systems? It seems to me this is partly because the payroll of a big company involved a lot of repetitive calculation, but also because it's particularly amenable to that sort of processing: multiply hours worked by hourly wage, output pay due that worker for this week or month. The core of the job can be done without the sort of table lookup that would need a large random access data store that would only be available a little later with the invention of drum memories, then disk drives.)
When video terminals came in, during the late sixties and early seventies, business data processing user interfaces were able to become essentially as they are today: two-dimensional forms, type data into captioned fields, look up lists of records. I have not been able to find any screenshots of business software from before MS-DOS – closest I could find was someone editing a Pascal program on an IBM terminal – but I predict business data processing systems essentially similar to modern ones, must have been developed for the 3270, VT50 etc.
But in between those, there was an era of 'interactivity, but not as we know it', when computers supported interactive work by teletype. This is when Basic was invented; many of the classic Basic games were actually written on teletype systems.
It seems to me there must have been business data processing systems designed for teletypes, which would provide user interfaces not as good as video terminals, but much better than punchcard batch processing. But now there is the tantalizing gap between deducing the necessary existence of something, and finding actual evidence of it; I have not so far been able to find any documentation on interactive business data processing by teletype, other than SABRE, which was something of a special case.
Take for example the hundreds of thousands of PDP-11s, many of which were connected to ASR-33 and similar teletypes. Many of those must've been used for order processing and other everyday business tasks. What did the workflow look like? Are the names and provenance of any relevant software packages still remembered? Are there any surviving photographs or transcripts of what was printed, or any recorded memoirs of what it was like to use them?