Patent US3495222A: Program controlled electronic computer. Angemeldet am 12. Januar 1968, veröffentlicht am 10. Februar 1970, Anmelder: Olivetti & Co SPA, Erfinder: Pier Giorgio Perotto et Al.
old-computers.com
Olivetti Programma P101/P102. Abgerufen am 13. November 2021: „The P101, and particularly the magnetic card, was covered by a US patent (3,495,222, Perotto et al. of march 1st 1965) and this gave to Olivetti over $900.000 in royalties by HP alone, for the re-use of this technology in the HP9100 series“
