Nobody, since there is no Pentium 5 processor.
There is no such thing as a Pentium 5. That would be a type of processor, except that Intel stopped naming them Pentium before the Pentium 5 came out.
No. No processor is, or ever has been, marketed as a "Pentium 5."
The first Pentium Is required a voltage of 5 volts.
There are no "ports" on a Pentium processor.
The Pentium brand has been relegated to low-cost / budget processors. Creating a processor called the "Pentium 5" would confuse consumers, who now expect a Pentium to be a cheaper processor, while the name would imply that it was a flagship successor to the Pentium 4.
There is no Pentium 5 processor. The mainstream (non-budget) Pentium line ends with the Pentium D, which is essentially a dual-core Pentium 4. The Core Solo, Core Duo, Core 2 Duo, and Core 2 Quad all have a very different architecture from the Pentium 4.
None, other than that you can get a Pentium I computer for about $5.
There is no "Pentium R" processor. Knowing this, the biggest difference is that the Pentium III exists and the other does not.
The first Pentium processors (Pentium 60 - 66). A Pentium OverDrive processor is also available for it.
pentium mmx
A Pentium 4 processor, and a motherboard that supports it.
Probably the Pentium Dual-Core, as it is the most recent processor to bear the Pentium name.