Acorn AtomCalc

Acorn AtomCalc ROM PCB (top)

Acorn AtomCalc ROM PCB(bottom) 

This is a spreadsheet ROM for the Acorn Atom. The card plugs in to the Utility ROM socket (IC24) and IC26. This card came from a Busicomputers Prophet 2.
 
I have no documentation for Acorn Atom Calc.