On IBM's architecture around the world, see chapter 3 in The Interface: IBM and the Transformation of Corporate Design, 1945 -- 1976 by John Harwood. The book is about how architects and designers Eliot Noyes, Edgar Kaufmann Jr., Paul Rand, Charles and Ray Eames, Eero Saarinen and many others gave IBM products a consistent look that expressed the corporate philosophy, from buildings and exhibits through computers and typewriters to publications and letterhead. The book is online at:
The IBM building in downtown Seattle was built in 1963. Designed by Minoru Yamasaki, who also designed the Pacific Science Center for the Seattle World's Fair in 1962 and the original World Trade Center towers in New York City. During the 1960s, IBM had a working System/360 machine room behind the glass windows facing the plaza, where the computer and its operators could be seen by shoppers and passers by.
https://muse.jhu.edu/book/24792
The IBM building in downtown Seattle was built in 1963. Designed by Minoru Yamasaki, who also designed the Pacific Science Center for the Seattle World's Fair in 1962 and the original World Trade Center towers in New York City. During the 1960s, IBM had a working System/360 machine room behind the glass windows facing the plaza, where the computer and its operators could be seen by shoppers and passers by.
https://unicoprop.com/properties/ibm-building/