Here is a picture of a binder for Tiny Troll, a product of Micro Finance Systems, a company run by Mitch Kapor, later of Lotus and 1-2-3 fame. Tiny Troll was an Apple ][-size version of Troll, a numerical analysis and plotting program. This binder actually contains an early beta copy of VisiPlot, which Mitch also created and then sold to Personal Software:

Tiny Troll binder, from Mitch Kapor's early company, pre-Lotus