# Questions

1. What do the "revisions" mean in the processor documentation at the ARM Information Center?
2. Do they refer to silicon processor core design revisions, documentation revisions, or something else?
3. What do the r and p stand for?

Please include a citation(s) if you can.

# Example

The Cortex-M3 documentation includes the following subsections:

• Revision: r2p1
• Revision: r2p0
• Revision: r1p1
• "r" is for "revision". "p" is for "point". – The Photon Jan 30 '17 at 18:03
• ARM doesn't make silicon, so there's no silicon to revise. – brhans Jan 30 '17 at 18:41
• @brhans, perhaps I should've said processor core design revisions? – cp.engr Jan 30 '17 at 18:44
• infocenter.arm.com/help/topic/com.arm.doc.ddi0438f/… – StainlessSteelRat Jan 30 '17 at 19:40