1. DataPerfect.
A DB package that started life as a legal office package, then moved to a more general application.
A fabulous RDMS for Dos, I believe it could handle up to 80 tables. This book came with a 5.5 inch floppy disk. I have R:Base on 3.25 floppies, but probably unrunnable now. Also a couple of R:Base report writing and database management utilities. Same problem. But a pity as this Microrim product was fabulously powerful for its day.
3. t/b/m The Business Manager
This was a system by ABC Systems, Ltd. I think an Australian product that sought to be the be all and end all tool for the low power systems of the day (1987). The forerunner of SAP, I daresay!
Again, on 5.5 inch floppies and unrunnable today, but looks like a great concept.
Another wonderful package from 1988 was 'MyAssistant' a type of notebook, diary, calendar, contact list, todo list.
Plenty of flexibility for an all-in-one tool that ran as a TSR (terminate stay resident) package in a DOS system. Forerunner of...maybe Agenda, but less powerful, maybe Outlook and OneNote combined and to run in a mini memory footprint by today's standards.