Smells like a Monolithic Memories part. A Google search on 63L241 did not produce any hits. Judging for the number of parts in the board, they could be RAM.
 
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Does anyone know what a MMI 63L241J is?  It's in a 16 pin DIP package
and is dated 1981. I have 28 of these on a board that I found. Besides the
MMI parts it has an Intel D3001 and nine Intel D3002 Bit-Slice parts.

   Joe

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