Industrial Micro Systems - 8K Static RAM Board
This looks like a relatively straightforward S-100 static RAM board. 

The board utilized the standard (at the time) 1KX1 21L02 RAM chips.  The board recognized the Phantom S-100 line (pin #67).  The board itself could be addressed to any 8K boundary in the 64K address space.

The rather simple but adequate manual with the schematic can be obtained here.

 

Other IMS S-100 Boards
16K RAM   32K RAM    64K DRAM    80186 CPU    FDC 400    FDC 930    HDC    IO Board    Z80 CPU  
8K RAM   4 Line Serial     CPZ 4800   LANS100    CPS-Q6A   CPS-MX   CPX-BMX   QIC Tape Controller  Other Boards