The ones listed by 4 or more people (not including Bell) were:

- CDC-6600 and 7600 - listed by Fisher, Sites, Smith, Worley

- Cray-1 - listed by Hill, Patterson, Sites, Smith, Sohi, Wallach (also Bell, sorta)

- IBM S/360 and S/370 - listed by Alpert, Hill, Patterson, Sites (also Bell)

- MIPS - listed by Alpert, Hill, Patterson, Sohi, Worley

Special mention:

- 6502 - only listed by Wilson, but she was the chief architect of ARM so i think her choice is important to note

- Itanium - mentioned in the top-ranked comment in this HN discussion

- DEC Alpha - mentioned in the second-ranked comment in this HN discussion