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Because we are located in the heart of Silicon Valley , we cater to the special needs of the chip and disk drive industry as we ... I mean , I fear , what if we make a chip and it is not able to perform the way we wished it would ? A blood sample is put onto the chip and it is passed through a scanner . No one else can use it because your photo is on the chip and they ’ re not you , " said Randy Vanderhoof , executive director of the Smart Card Alliance . Cyrix 6x86MX CPUs does n't show any marking that would tell you the revision number of the chip and they do n't seem to be happy about IBM having this ' revision level ' marking on their 6x86MX CPUs , which is the last letter in the OEM product number printed on the chip ( currently ' A ' = revision 1.3 ) . The reason that they are parallel is that there are limitations to the number of transistors which can be packed onto a chip and we are rapidly approaching this limit , in spite of all of the efforts made by VLSI designers .