Their goal was to provide a simplified upgrade path for the newly released IBM Personal Computer which did not come with a hard drive.

[1] The company was originally incorporated as BBH Corporation (using the initials for Berkley, Brown, and Harrison), but also used the name Bits in Space for fun.

At that time, all of the other products were using a standard hard drive with a 1.6 inch/40.6 mm height forcing the card to hang over the adjacent PC slot.

The hard drive was located on the opposite side away from the connector sometimes enabling a short half-length expansion card to be installed in the adjacent slot.

Over the eight years of its existence, Plus Development had only a single acquisition, La Cie, of Tualatin, Oregon, a manufacturer and direct marketeer of external hard drives for Apple Computer products.