Cray-1 SuperComputer Memory Module Board. Circa 1976. Single sided.Back are ELC

Cray-1 SuperComputer Memory Module Daughter Board. ( Double, Both sides )

Cray X-MP E.L.C. SuperComputer Memory Module. Circa 1984. Double Sided Board.

Cray-2 SuperComputer Memory Module Daughter Board. Circa - 1982

Cray-1 SuperComputer Memory Module Board. Circa 1976. Single sided.Back are ELC

Cray-1 SuperComputer Memory Module. Circa 1976. Double Sided Board.

Cray-2 SuperComputer Memory Module Daughter Board. Circa - 1985. Smaller IC’s.

Cray-2 SuperComputer Memory Module Daughter Board. Circa-1985 Larger Or Big IC’s