https://site.xavier.edu/polt/typewriters/typers.html

Users of the Royal FP included: Herb Caen, Peter De Vries, Stephen King, Melissa Ludtke, Frank O'Hara, and Morley Safer.

https://youtu.be/UTtDb73NkNM?t=49

CBS has a card index with an index card indicating that Morley Safer brought an Olivetti typewriter to the office.

Whose card index was this? What other purpose did it serve?