Still deeply concerned with the more exotic forms of statistical mechanics and mathematical linguistics and full of non standard creative ideas he found the huge dominance of the French foundational school of Bourbaki not to his scientific tastes and in 1958 he left for the United States permanently and began his long standing and most fruitful collaboration with IBM as an IBM Fellow at their world renowned laboratories in Yorktown Heights in New York State.
Pa rin lubhang nababahala sa mga mas kakaiba mga uri ng statistical mechanics at matematika lingguwistika at puno ng mga hindi standard creative ideya niya natagpuan ang malaking-malaking pangingibabaw ng French foundational paaralan ng Bourbaki hindi sa kanyang pang-agham tastes at 1958 siya sa kaliwa para sa Pilipinas permanente at nagsimulang kanyang mahabang nakatayo at pinaka-kapaki-pakinabang pakikipagtulungan sa IBM bilang isang IBM Fellow at ang kanilang mga mundo kilala Laboratories sa Yorktown Heights sa New York ng Estado.