What is a P90 MHZ computer?

Little of history first Was the first Pentium CPU made by INTEL, the successor to 486 CPU. Instead INTEL name the next generation proccesors with a number ,(every time INTEL's CPU architecture changed it use a number to submit the change) like all the former models,(286,386,486) and while most of the people believed tghat the new name will be 586, INTEL came out with the name PENTIUM, (means 5 in Latin) and keep this name till today ,even after 4 major architectural changes. So from 1993 INTEL adopt the PENTIUM name and put nummbers after P every time an architectural change made. So we had Pentium (P) Pentium2 (P2) ETC. P90 MHZ computer means a computer with a first generation PENTIUM Proccesor, with a clock speed to 90MHz and was the third CPU of Pentium, two first CPUs run at 60MHz and 66MHz.