Chronology

Year	Hardware	Software
1944 - 52	Harvard Mark I to Mark IV
1951	Whirlwind I
1959	Mod(el) 1A	YUL cross-assembler (runs on IBM 650)
1960	Mod 1B
?1961	Mod 3S
1962	Mod 3C
	AGC3
1963	AGC4 (Block I)	Eclipse
1963-4	AGC4B (Block I)
1964	AGC5 (Block I)	Sunrise
1964	AGC6 (Block I)
1965	AGC200M (Block II)
1965	AGC4 (Block II)